Three new species of Lychnophorinae from the Brazilian Central Plateau (Asteraceae: Vernonieae)
Loeuille, Benoît
Bringel Jr, João Bernardo De A.
Faria Jr, Jair E. Q.
Valls, José F. M.
Phytotaxa
2022
2022-01-21
531
3
249
266
8VMSB
Semir ex Loeuille, Bringel & Faria
Semir ex Loeuille, Bringel & Faria
2022
[136,817,1382,1409]
Magnoliopsida
Asteraceae
Lychnophora
Plantae
Asterales
9
258
Tracheophyta
species
planaltina
sp. nov.
Type:— BRAZIL. Distrito Federal: Brasília, Estação Ecológica Jardim Botânico de Brasília, área do Cristo Redentor, 15°54’51’’S, 47°53’27’’W, elev. 1124 m, 7 September 2019, J. E. Q . Faria9630( holotype: HEPH!, isotypes: RB!, UFP!).
Description:—Shrub, 0.4–1.3 mtall, erect. Stems moderately branched, delicate, whitish ochraceous lanate with lenticular to linear leaf scars following leaf fall, becoming silverish to dark greyish villosulous, somewhat glaucous with age. Leaves alternate, simple, sessile; blade linear, very narrow elliptic, rarely lanceolate, 1.9–8.7 × 0.3–0.7 cm, venation brochidodromous, midrib prominent, furrowed abaxially, impressed adaxially, adaxial surface bullate, silverish green, glaucous, sparsely lanulose, abaxial surface densely whitish lanate, tomentum of unbranched, long, thin trichomes, 3- to 5-armed with long, thin-armed trichomes, coriaceous, margins entire, slightly revolute, unfrequently flat, apex obtuse with an inconspicuous mucro sometimes concealed by indumentum, base rounded or truncate. Capitula fused in a solitary, rarely two, terminal syncephalium (secondary order inflorescence). Syncephalium 1–2 cmtall, 1.3–2.5 cmdiam., hemispherical, interspersed with few small leaf-like bracts; secondary bracts lanceolate, sometimes linear, leaf-like, 1.5–3.2 × 0.3–0.4 cmlong. Capitula 15–ca. 60, homogamous, discoid, sessile, fused 2/3 of length; involucre 5.2–6.0 mm tall, 1.5–2.8 mmdiam., cylindrical, 4–5-seriate; phyllaries weakly imbricate, light greenish, apex acute and darker, deciduous, outer phyllaries 3.2–4.2 × 0.6–1.4 mm, ovate to lanceolate, upper half densely whitish lanose, inner phyllaries 4.8–6.2 × 0.9–1.2 mmlong, linear to narrow oblanceolate, apex densely whitish lanose; receptacle slightly convex, naked. Florets 3 per capitulum, bisexual, fertile; corolla actinomorphic, deeply 5-lobed, lilac, corolla tube 3.2–3.5 × 1.5–1.7 mm, glabrous, corolla lobes 3.5–3.7 × 0.8–1 mm, glandular-punctate, pilose towards apices, apex acute; anther whitish or lilac, apical anther appendages lanceolate, acute, anther base sagittate, acute; style shaft 7.8–8.9 mmlong, white or pale lilac, glabrous throughout except for pubescent upper ca. 2.9 –3.1 mmbeneath style arms, style arms ca. 1.5 mmlong, apex acute, pubescent outside, hairs acute, style base glabrous, lacking basal node. Cypsela prismatic, 3.5–4.0 × 1.2–1.7 mm, 10-ribbed, angled, light brown, upper half frequently darker, sparsely sericeous, glandular-punctate, sometimes connate in pair; carpopodium inconspicuous; pappus setae biseriate, whitish, paleaceous, outer series setae 0.9–2.1 mm, persistent, free or slightly fused at base, apex acute, erose, inner series setae 4.0– 5.1 mm, caducous, barbellate, slightly twisted.
Distribution, habitat, and conservation status:— Lychnophora planaltinais restricted to the campos rupestres in Environmental Protection Area ( Área de Proteção Ambiental) Bacias Gama e Cabeça de Veado (APAGCV) ( Fig. 3, 9). The APAGCV links continuous protected areas that differ in management regulations and governmental institution in charge but share the conservation purpose ( UNESCO 2003). Nevertheless, these protected areas are surrounded by urban occupation, which can affect environmental quality ( UNESCO 2003, Aguiar 2015). There are two locations of occurrence of L. planaltina, with the first collection dating to more than 40 years ago (1968), made in a farm that belongs to the local public university (FAL - Fazenda Água Limpa, Universidade de Brasília); ca. 22.09 km 2of the 42.31 km 2of the farm are determined as environmental protection area by the Brazilian law ( Aguiar 2015) ( Fig. 9). Although more than half of the area of the farm is destined to environmental conservation, we cannot verify that this population is still preserved due to the lack of a precise description of the collection location in the label of this first L. planaltinaspecimen. The most recent collections are from one single location in the Jardim Botânico de Brasília (Brasília Botanic Garden) ecological station (Estação Ecológica Jardim Botânico de Brasília - EEJBB), which shares a boundary with FAL. Less than five individuals were found in this second location.Although we could not precisely calculate the EOO and AOO for L. planaltina, we believe it has an extremely reduced population, covering a very restricted area, which is surrounded by the urban occupation of Brasília. Therefore, we considered it Critically Endangered.
Etymology:—The species epithet refers to the geographic distribution, as in Portuguese planaltinameans that who inhabits the Brazilian Central Plateau. Additional specimens examined ( paratypes):— BRAZIL. Distrito Federal: Brasília, Estação Ecológica Jardim Botânico de Brasília, área do Cristo Redentor, 15°54’52’’S, 47°53’28’’W, 10 August 2019, J. E. Q . Faria9548( HEPH, UB); Fazenda da Universidade Federal[ Fazenda Água Limpa da Universidade de Brasília], 12 December 1968, N. L . Menezes2( SP); Morro do Urubu, 15°54’51’’S, 47°53’27’’W, 1125 melev., 20 January 2020, J. E. Q . Faria& A. C. A. Soares10169 ( UB).
Discussion:— Lychnophora planaltinais morphologically closely related to L. crispa Mattfeld (1923: 429)by its adaxially bullate leaves with an inconspicuous mucro, and cylindrical involucre with deciduous weakly imbricate phyllaries. However, it differs from the latter by its glaucous, linear, very narrow elliptic, or rarely lanceolate leaves (vs. greenish, ovate to lanceolate), solitary syncephalium (vs. subcorymb, rarely solitary) and sparsely sericeous cypsela (vs. glabrous). The two species do not occur in sympatry: L. crispais found in the Espinhaço mountain range in the states of Bahia (Chapada Diamantina)and northern Minas Gerais, whereas L. planaltinais restricted to the Brasília area in the Distrito Federal.An interesting feature of L. planaltinais the cypselae connated in pairs in some individuals, a phenomenon that has been observed in L. pinaster Martius (1822: 152)and Lychnocephalus jolyanusSemir ex Gomes & Loeuille (2021: 483). FIGURE 9.Distribution map of Lychnophora planaltinawith satellite image (Bing Virtual Earth). APAGCV: Área de Proteção Ambiental Gama e Cabeça de Veado. FAL: Fazenda Água Limpa. The Lychnophora planaltinaspecimen cited above, Menezes 2(SP108141), was included in a study of the leaf anatomy of several Asteraceaefrom campos rupestres ( Handro et al.1970), but was then identified as L. reticulata Gardner (1846: 233)[= Eremanthus reticulatus(Gardner) Loeuille et al.(2019: 43)]. This is the same specimen that João Semir described in his unpublished Ph.D. thesis ( Semir 1991), in which he placed L. planaltinain a species complex with L. crispaand L. reticulata, but a phylogenetic analysis of Lychnophorinae ( Loeuille et al.2015)showed that L. reticulatabelongs to the genus Eremanthusand not in Lychnophora.
3450195344
2019-09-07
J, E, Q
Brazil
Brasilia
1124
-15.914166
Cristo Redentor
21
-47.890835
Estacao Ecologica Jardim Botanico de Brasilia
9
258
1
Distrito Federal
3450195316
[713,1221,1566,1588]
HEPH, RB, UFP
Brazil
Faria
9
258
1
Distrito Federal
holotype
3450195317
2019-08-10
J, E, Q
Brazil
Brasilia
-15.914444
Cristo Redentor
21
-47.891113
Estacao Ecologica Jardim Botanico de Brasilia
13
262
2
Distrito Federal
paratype
3450195333
HEPH, UB
Brazil
Faria
13
262
1
Distrito Federal
3450195347
[334,1448,590,619]
1968-12-12
N, L
Brazil
Fazenda Agua Limpa da Universidade de Brasilia
13
262
1
Universidade Federal
3450195302
[136,1266,626,653]
2020-01-20
SP, J, E, Q
Brazil
1125
-15.914166
Morro do Urubu
21
-47.890835
Menezes
13
262
1
Universidade Federal
3450195355
[1277,1448,627,653]
A, C
Brazil
Faria
13
262
1
Universidade Federal
3450195322
[136,356,662,689]
UB
Brazil
Soares
13
262
1
Universidade Federal