Pandanus decumbens (Brongn.) Solms

Callmander, Martin W. & Buerki, Sven, 2013, Notes on New Caledonian Pandanaceae: identity and typifications of Pandanus decumbens (Brongn.) Solms and Pandanus reticulatus Vieill., with the new species Pandanus letocartiorum Callm. & Buerki, Candollea 68 (1), pp. 51-60: 52-54

publication ID

http://doi.org/ 10.15553/c2013v681a4

DOI

http://doi.org/10.5281/zenodo.5735572

persistent identifier

http://treatment.plazi.org/id/03E887D7-FFB4-CF18-FCCE-FE98FE169EFE

treatment provided by

Carolina

scientific name

Pandanus decumbens (Brongn.) Solms
status

 

Pandanus decumbens (Brongn.) Solms   in Linnaea 42: 47. 1878 ( Fig. 1 View Fig , 2 View Fig , 3A View Fig ).

Ξ Barrotia decumbens Brongn.   in Ann. Sci. Nat., Bot. ser. 6, 7: 285. 1875.

Lectotypus: NEW CALEDONIA: Iles des Pins, sur les pentes du Pic [N’ga], [23°20’42’’S 167°27’25’’E], fr., Pancher 342 ( P [P02077365]!; GoogleMaps   iso-: FI!, P [P02077364, P02077366, P02077367, P02139406]!) (lectotypified by ST. JOHN, 1989: 24) GoogleMaps   .

= Pandanus neocaledonicus Martelli   in Webbia 4: 416. 1914.

Lectotypus (designated here): N EW CALEDONIA: s.d., fr., s.coll. ( FI!; iso-: P [ P 00700817]!).  

= Pandanus schlechteri Warb.   in Bot. Jahrb. Syst. 39: 17. 1906.

Typus: NEW CALEDONIA: Süd-Bezirk. Auf den Bergen bei Yaouhé , [22°11’45’’S 166°29’54’’E], 400 m, X.1902, fr., Schlechter 15053 (holo-: B [ B100 352291, image seen]!; GoogleMaps   iso-: FI!, P [P00649506]!). GoogleMaps  

Pandanus reticulatus sensu Martelli   in Webbia 4: 29, 62, 94. 1913; 4: tab. 2, fig. 7-9. 1914.

Slender-stemmed shrub, the stem usually decumbent, branched or not, often quite short but sometimes elongated, up to 4 m tall, with rather smooth light brown bark and a few distant blunt prickles; few prop roots, little developed, to ca. 20 cm long. Leaves linear-attenuate, mostly 100-135(-160) cm long, (15-)20-25(-50) mm wide, apex attenuate, sometimes sub-flagellate; thin sub-coriaceous to chartaceous, dark green and shiny axially, paler green and shiny adaxially; longitudinal veins visible on both surfaces; marginal prickles borne 7-8 cm above base to apex, antrorse, 0.5-1 mm long in the lower third, 2-8 mm apart, 0.4-0.6 mm long in the mid-third, 2-4 mm apart, to 0.2-0.4 mm long in the distal third, 1-2 mm apart, subappressed; midrib unarmed in the lower half, prickles> 0.2 mm long towards the apex, irregularly spaced but mostly 2-10 mm apart; apical ventral pleats with antrorse prickles,> 0.2 mm mm long, mostly 1-6 mm apart; sheath 5-7 cm long, ca. 2-3 cm wide at apex, 4-5 cm at base. Infructescence terminal, the solitary syncarp sub-cylindric, (3-) 7-15 cm long, (3-) 5-8 cm wide, peduncle ca. 8-15(-35) cm long, ca. 2 cm thick at apex, bearing foliaceous bracts, the proximal ones ca. 60-80 cm long, the distal one 12-14 cm long, crowded at peduncle apex and often covering the syncarp. Drupes numerous, 100-180, ca. 15-25 mm long, 10-20 mm wide, 4-10 mm thick, mostly (1-)3-4(-5)-celled, (4-)6-angled, obovoid, at apex truncate or shallowly concave, upper third free with smooth, dull, gently incurved faces. Stigma (1-)3-4(-5), ca. 1-2 mm wide, slightly heightened (ca. 2 mm) on an appressed style, forming one row, deflected toward the cephalium apex. Endocarp median, ca. 10 mm long, concave at apex, lateral walls 2-4 mm thick; proximal mesocarp 8-10 mm long, fibrous-fleshy, distal mesocarp 6-10 mm long, sparsely fibrous, chambered, seed locule ca. 4 × 7 mm, ellipsoid. Staminate inflorescence a raceme of spikes, ca. 13-23 cm long; peduncle fleshy; bracts ca. 10, distal ones foliaceous, proximal ones caniculate, the distal bract ca. 2 × 10 cm; spikes (4-)5, mostly 2-4 cm long, up to 15 mm diam., short cylindric, composed of crowded phalanges of stamens (stemanophore); its a column 4-6 mm long, apically distended, umbrella like, peltate, to ca. 4-5 mm wide, blackish when dry; stamens ca. 50-70, borne along upper part of the stemanophore and (mostly) under the apical discoid surface; filaments ca. 0.5 mm long; anthers 1.5- 2.4 mm long, to 0.5 mm wide, pale yellow, apiculate; apiculus 0.2 mm long.

Distribution and ecology. – Pandanus decumbens   is mostly found at lower to mid elevations (0-400 m). It grows on both serpentine and calcareous substrates, usually in rocky sites. The species is widespread along the west coast from Iles des Pins to Koumac usually in Maquis or dry forests and often along creeks ( Fig. 1 View Fig ).

Conservation status. – With an EOO of 15 642 km 2, an AOO of 324 km 2, and 18 subpopulations, three of which are situated within the protected area network (Barrage Yaté, Mt. Panié, Vallée de la Thy), P. decumbens   is assigned a preliminary status of Least Concern (LC) based on the IUCN Red List Categories and Criteria ( IUCN, 2001).

Notes. – Pandanus decumbens   was described by BRONGNIART (1875) under the basionym Barrotia decumbens Brongn.   , it was based on two syntypes: Balansa s.n. and Pancher 342. Balansa s.n. has not been located either at FI or at P. Pancher 342 is a complete collection comprising leaves, young and mature syncarps and drupes at P and separate drupes at FI. ST. JOHN (1989: 24) therefore designated this collection as the lectotype. The sheet of Pancher 342 at P [P020 77365] bears a label with “n°8” annotation (see “sonneratphoto.mnhn.fr/ 2010/12/03 /2/P02077365.jpg” for scanned specimen), as well as an original Pancher label with “342” clearly indicated. St. John wrongly cited the collection as Pancher 8 when he lectotypified the species. Note that St John actually cited the sheet as the holotype, but this is to be considered as an effective lectotypification since it was published before 2001 (see MCNEILL & al., 2012 [art. 9.23]).

MARTELLI (1914) misinterpreted Pandanus decumbens   and considered this species to be a synonym of P. reticulatus   along with P. schlechteri Warb. He   consequently described a new species, P.neocaledonicus Martelli   , to accommodate a specimen (s.coll.) deposited at the Caen Museum. This material is believed to have been destroyed during World War II, but fragments of the collection have been found at FI and P. The FI sheet is designated as lectotype because it is in better condition and less fragmentary than the sheet at P. This collection clearly belongs to P. decumbens   with its stigma slightly raised (ca. 2 mm) on an appressed style, arranged in one row and deflected toward the cephalium apex ( Fig. 2 View Fig , 3A View Fig ). Pandanus neocaledonicus   is therefore considered as a synonym of P. decumbens   along with P. schlechteri   , the latter already being treated in this way by ST. JOHN (1989).

Additional material examined. – NEW CALEDONIA: Pic N’ga , [23°20’42’’S 167°27’25’’E], 29.V.1951, fr., Bauman-Bodenheim 13696 ( K, P [ P02077342], Z); GoogleMaps   Pic N’ga , creek sur les pentes SW, [23°20’42’’S 167°27’25’’E], 30.V.1951, st., Bauman-Bodenheim 13801 ( P [ P 02139407]); GoogleMaps   Ouroué , [21°34’59’’S 166°11’32’’E], 26.VI.1951, st., Bauman-Bodenheim 13696 ( P [ P 02077340]); GoogleMaps   Poum , 20°14’08’’S 164°01’23’’E, 13.IV.2006, fr., Barrabé 356 ( NOU [ NOU 014166], P [ P 02075145]); GoogleMaps   N. of Dumbéa valley , [22°08’15’’S 166°29’05’’E], 150 m, 7.VII.1947, fr., Buchholz 1178 ( P [ P 021 39409]); GoogleMaps   Mont Dzumac , 22°05’59”S 166°27’02”E, 572 m, 23.I.2010, fr., Callmander & al. 827 ( G, NOU, P [ P 00700824]); GoogleMaps   Sur la route de Gouapin , Nétéa , 21°14’32”S 165°14’50”E, 15 m, 16.II.2011, st. fl., Callmander & al. 976 ( G, MO, NOU); GoogleMaps   Sur la route de Gouapin , Nétéa , 21°14’41”S 165°16’25”E, fr., Callmander & al. 977 ( P [ P 007 00859]); GoogleMaps   Massif du Boulinda , en dessous de la mine Saint-Louis, 21°18’48”S 165°06’12”E, 320 m, 18.II.2011, fr., Callmander & al. 978 ( BISH, G, MO, K); GoogleMaps   Massif du Boulinda , en dessous de la mine Saint-Louis, 21°18’44”S 165°06’11”E, 365 m, fr., Callmander & al. 979 ( MO); GoogleMaps   Massif de Poum , plaine côté E, 20°15’37’’S 164°02’17’’E, 8.V.2008, y. fr., Dagostini 1603 ( NOU [ NOU 049031]); GoogleMaps   Iles des Pins , sur les pentes du Pic, [22°39’22’’S 167°27’39’’E], 1862, fr., Deplanche 143 ( P [ P 02077336]); GoogleMaps   Iles des Pins , 1874-1876, st., Germain s.n. ( P [ P 02077337, P 02077338, P 02077339]);   Mt. Mou , [22°04’35’’S 166°21’08’’E], 15.X.1950, st., Guillaumin & Bauman- Bodenheim 6898 ( P [ P 02077335]); GoogleMaps   Mt. Mou , 300 m, [22°04’35’’S 166°21’08’’E], 15.X.1950, fr., Guillaumin & Bauman-Bodenheim 6953 ( G, P [ P 02139401], Z); GoogleMaps   Pic Tiaoué , 200-400 m, 21°10’46’’S 165°01’24’’E, 7.XI.2006, Hequet (Leg. Butin) 3661 ( NOU [ NOU 01 7072]); GoogleMaps   Ouégoa , St André Yallin , ca. 100 m, [20°19’47’’S 164°26’ 29’’E], 24.VII.1968, fr., Jaffré 60 ( BISH); GoogleMaps   Dumbéa N. au bas du Col. , rive droite, [22°08’15’’S 166°29’05’’E], 6.II.1970, st. fl., Jaffré 357 ( BISH, NOU [ NOU 048525, NOU 048526]); GoogleMaps   Dumbéa N. au bas du Col. , rive droite, fr., Jaffré 358 ( BISH, NOU [ NOU048528]); GoogleMaps   vallée de la Thy , [22°10’53’’S 166°31’58’’E], 3.VI.1973, fr., Jaffré 1128 ( NOU [ NOU048535]); GoogleMaps   Iles des Pins , base du Pic N’Ga, [22°39’18’’S 167°27’25’’E], 10.VIII.1975, fr., Jaffré 1443 ( PH [ PH 0072764]); GoogleMaps   Thy vallée , [22°10’53’’S 167°28’02’’E], 50-100 m, 8.I.1956, st., MacKee 3748 ( BISH, K, P [ P 02077362]); GoogleMaps   Dumbéa Valley , [22°08’15’’S 166°29’05’’E], 100-200 m, 5.II.1956, fr., MacKee 3980 ( BISH, K, P [ P 02077361]); GoogleMaps   Dumbéa Valley below battage , [22°08’15’’S 166°29’05’’E], 100 m, 17.III.1956, y. fr., MacKee 4100 ( BISH, K, P [carpo]); GoogleMaps   7 km from Kone on road to Voh, [21°01’59’’S 164°47’ 44’’E], 10 m, 1.IV.1959, fr., MacKee 4309 ( P [carpo]); GoogleMaps   Iles des Pins , slopes of Pic N’ga, [22°39’408’’S 167°27’41’’E], 100-200 m, 5.VII.1956, st., MacKee 5051 ( P [ P 02077353]);   Ouroué (embouchure de la Dothio), [21°34’59’’S 166°11’32’’E], 10-150 m, 20.X.1965, fr., MacKee 13633 ( P [ P 02077352, carpo]); GoogleMaps   Vallée Koumac , [20°31’30’’S 164°22’58’’E], 21.VI.1967, fr., MacKee 16968 ( BISH, FI [carpo], NOU [ NOU 048532], P [ P 02077351, carpo]); GoogleMaps   Voh , Base SE , Tahafé , [20°57’44’’S 165°15’35’’E], 7.VII.1970, y. fr., MacKee 22166 ( BISH, NOU [ NOU 048513], P [ P 02077348, carpo]); GoogleMaps   Ile Yandé : Houone , [20°03’28’’S 164°12’21’’E], 7.X.1970, fr., MacKee 22657 ( BISH, G, MO, NOU [ NOU 048512], P [ P 02077238, P 00700823, carpo]); GoogleMaps   Poum , Anse Pouani , [20°15’42’’S 164°05’ 03’’E], 0-20 m, 5.I.1971, fr., MacKee 23158 ( G, NOU [ NOU 048511], P [ P 02077347, carpo]); GoogleMaps   Poum , Anse Pouani , 17.II.1971, fr. & st. fl., MacKee 23348 ( G, MO, NOU [ NOU 048524], P [ P 02077329]);   SE de la corne de Koumac, [20°30’ 44’’S 164°19’32’’E], 250 m, 13.IV.1972, fr., MacKee 25240 ( G, P [ P 02139399]); GoogleMaps   Koumac, au N du ruisseau Grand Forêt , [20°30’16’’S 164°20’45’’E], 250 m, 20.IX.1973, fr., MacKee 27477 ( NOU [ NOU 048514], P [ P 02139403, P 02139404], PH); GoogleMaps   Hienghene , Pindache , [20°42’05’’S 165°00’24’’E], 100 m, 21.VIII.1976, fr., MacKee 31791 ( G, NOU [ NOU 048533], P [ P 01865133], PH [ PH 000 72776]); GoogleMaps   Thio , Meh , [21°37’44’’S 166°15’54’’E], 24.VI.1977, fr., MacKee 33347 ( NOU [ NOU 048510], P [ P 01865135], PH); GoogleMaps   Goro , Nokotaré , [22°19’16’’S 167°00’31’’E], XI.1978, fr., MacKee 36094 ( NOU [ NOU 048470], P [ P 02095730, carpo], PH [ PH 00072768]); GoogleMaps   Koua Riv. , [21°21’51’’S 165°42’49’’E], 30 m, 4.VII.1979, fr., MacKee 37082 ( G, P [ P 02077346], PH); GoogleMaps   Yaté , [22°09’20’’S 167°05’53’’E], 100 m, 28.VII.1985, fr., MacKee 42691 ( NOU [ NOU 048536], P [ P 02077345], PH); GoogleMaps   S of Thio : on coastal road, between Nimbo and Camboui Rivers, 21°45’S 166°27’E, 26.IV.1984, fr., McPherson 6514 ( MO, PH [ PH 0072760]); GoogleMaps   Port Bouquet , Koum riv. , 21°44’21’’S 166°22’20’’E, 155 m, 24.XI.2011, fr., Munzinger 1040 ( MO, NOU); GoogleMaps   Col de Mo , 22°02’17’’S 166°10’48’’E, 200 m, 24.XI.2007, fr., Munzinger & al. 4932 ( NOU [ NOU 050584, NOU 030816]); GoogleMaps   Tango Plateau , 21°01’18’’S 165°00’53’’E, 350 m, 16.IV.2008, fr., Munzinger (leg. Butin) 5116 ( NOU [ NOU 050463]); GoogleMaps   Creek Pandanus , 21°01’ 29’’S 164°46’42’’E, fr., Munzinger 5787 ( NOU, P [ P 00700841, P 00700844]); GoogleMaps   Ponandou , 20°49’01’’S 165°14’04’’E, 30 m, 29.IX. 2009, fr., Munzinger et al. 5860 ( MO, NOU, P); GoogleMaps   Creek à Paul , [20°29’29’’S 164°12’29’’E], 28 m, 26.XI.2009, fr., Munzinger & al. 6013 ( NOU, P [carpo]); GoogleMaps   Base W du massif de Poum , 20°15’28’’S 164°02’40’’E, 23.VII.2007, fr., Pillon 758 ( NOU [ NOU 020033], P [ P 02082148, carpo]); GoogleMaps   Port Bouquet , Ile Toupeti , [21°43’14’’S 166°25’ 05’’E], 3.XII.1982, fr., Suprin 1919 ( G, NOU [ NOU048508], P [ P02077363], PH) GoogleMaps   ; Thio, berge de creek , [21°36’39’’S 166°12’ 30’’E], 21.II.1972, fr., Veillon 2531 ( NOU [ NOU 048521, NOU 04 8522, NOU 048523], P [ P 02139396]); GoogleMaps   Thio , [21°36’39’’S 166°12’ 30’’E], 7.V.1971, y. fr., Veillon 2573 ( NOU [ NOU 048538, NOU 048 539], P [ P 02139397], PH); GoogleMaps   Extrêmité SE de la Pointe N’Go , [22°18’ 40’’S 166°41’51’’E], XI.1974, fr., Veillon 3129 ( MO, NOU [ NOU 04 8355, NOU 048356, NOU 048357, NOU 048358, NOU 048359, NOU 048360], P [ P 2081996, P 02139456, carpo]); GoogleMaps   Montagne de Poum , creek au pied du Pic 272, [20°14’55’’S 164°01’17’’E], 25.III.1982, fr., Veillon 4855 ( NOU [ NOU 048537, NOU 048443], P [ P 02139398, carpo], PH [ PH 00072762]); GoogleMaps   Mont Panié , [20°33’48’’S 164°47’32’’E], 300 m, 22.VII.1982, y. fr., Veillon 5249 ( NOU [ NOU 048478], P [ P 02095728], PH); GoogleMaps   Thio haute Dothio , ca. 200 m, [21°36’39’’S 166°12’30’’E], 20.X.1988, fr., Veillon 6977 ( NOU [ NOU 020752], P [ P 02077344, carpo]). GoogleMaps  

NOU

NOU

BISH

BISH

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Pandanales

Family

Pandanaceae

Genus

Pandanus

Loc

Pandanus decumbens (Brongn.) Solms

Callmander, Martin W. & Buerki, Sven 2013
2013
Loc

Pandanus reticulatus sensu

Martelli 1914: 52
Martelli 1913: 29, 62, 94
1913