Gossia aphthosa subsp. longipedunculata N. Snow & Munzinger, 2020

Snow, Neil, 2020, A revision of New Caledonian Gossia N. Snow & Guymer (Myrtaceae), Adansonia 42 (7), pp. 131-177 : 142

Gossia aphthosa subsp. longipedunculata N. Snow & Munzinger , subsp. nov. ( Figs 5 ; 13E-I )

Differing from Gossia aphthosa subsp. austro-orientalis N. Snow & K. Gandhi, subsp. nov. by its somewhat longer inflorescences (5-8 cm vs less than 6 cm in G. a. subsp. austro-orientalis N. Snow & K. Gandhi, subsp. nov.), more stiffly coriaceous leaf blades, and different eco-geography. Also resembling Gossia colnettiana , but that species has rounded to cuneate leaf bases (vs cordate-clasping leaf bases in G. a. subsp. austro-orientalis N. Snow & K. Gandhi, subsp. nov.).

TYPUS. — New Caledonia. Grande Terre , North Prov., Haute Amoa, 21°00’02.98”S, 165°14’31.99”E, 300-400 m, 7.IX.1968, MacKee 19502 (holo-, P [ P05094105 ]; iso-, NOU [ NOU029685 ]).

PARATYPI. — New Caledonia. Nékoro , prop. P. Johnson, 1.IV.2004, Dagostini 654 ( NOU [ NOU001193 ) ; Haute Vallée de l’Amoa , 21°00’02.98”S, 165°14’31.99”E, 12.VIII.1965, MacKee 13229 ( BISH, MO[ MO-04777159 ], NOU [ NOU023797 ], P[P00462868, P00462869, P00462870] ; ibid. loco, 300 m, 28.IV.1968, MacKee 18698 ( NOU [ NOU029687 ], P[P02089984]) ; Ponérihouen , 21°11’00.99”S, 165°17’48.98”E, 700-900 m, 6.XI.1972, MacK- ee 25749 ( NOU [ NOU053235 ]) ; ibid. loco, 21°11’00.99”S, 165°17’48.98”E, 28.IV.1973, MacKee 26628 ( NOU [ NOU053235 , NOU053038 ) ; HauteTchamba , 21°0’55”S, 165°15’6”E, 10.XI.2002, Munzinger 1456 et al. (MO[ MO-04767308 ], NOU [ NOU002675 ], P[P00354535], WELTU) .

REPRESENTATIVE HERBARIUM SPECIMEN. — P00354535.

ETYMOLOGY. — In reference to the relatively long peduncles occurring on many specimens.

DISTRIBUTION, HABITAT AND PHENOLOGY. — Central Grande Terre, near Ponérihouen, Haute Tchamba, and Haute vallée de l’Amoa ( Fig. 5 ) in humid forests on volcanic-sedimentary soils, 300- 900 m. Flowering confirmed August through April; fruiting October and November.

REMARKS

This subspecies is recognized most easily by its large (8-12 mm) petals. (An unpublished manuscript name of mine for some specimens was Gossia “grandiflora”.) The inflorescences often are densely fasciculate in leaf axils or on branches and stems. It can also resemble G. kuakuensis , but that species has larger flowers and a slightly ribbed to rugose hypanthium.

Figures

FIG. 5. — Distribution map for subspecies of Gossia aphthosa (Brongn. & Gris) N. Snow.

FIG. 13. — A-D, Gossia diversifolia N. Snow, sp. nov.: A, branch with flowers; B, detail of branchlet with quadrangular-winged young stems; C, flower in bud; D, immature fruit; E-I, Gossia aphthosa (Vieill. ex Brongn. & Gris) N. Snow subsp. longipedunculata N. Snow & Munzinger, subsp. nov.: E, leaves and terminal inflorescence; F, flower detail prior to anthesis;G, apical view of flower with staminal disk (petals and stamens removed);H, branch with leaves and inflorescence; I, maturing fruit. J, K, Gossia kaalaensis N. Snow, sp. nov.: J, branch with inflorescences, petiole (adaxial view) to right, raised adaxial leaf venation near margin (enlarged at upper left); K, immature fruit. Vouchers: A-C, MacKee 43897 (NOU); D, Jaffré 3228 (NOU); E-G, MacKee 26628 (NOU); H-I, MacKee 25749 (NOU); J, K, McPherson 2551 (P). Scale bars: A, J, 2 cm; B, 1 cm; C, D, K, 3 mm; E-G, I, 5 mm; H, 2 mm.