Vernonieae

Notice:

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Taxonavigation

Ordo: Asterales
Familia: Asteraceae

Name

Cassini, J. Phys. Chim. Hist. Nat. Arts 82: 132. 1816. – Wikispecies link – IPNI link – Pensoft Profile

• Serratula noveboracensis L., Sp. Pl.: 818. 1753.

Type

Vernonia noveboracensis (L.) Willd., Sp. Pl., ed. 4, 3: 1632. 1803.
Herbs, shrubs, vines or trees. Stems acaulescent or caulescent. Leaves simple, usually alternate sometimes opposite or ternate, petiolate or sessile; lamina ovate, obovate, lanceolate, oblanceolate or elliptic, pubescent, margin serrate or entire, apex rounded, acute or acuminate, base cuneate or attenuate, membranaceous, chartaceous or coriaceous. Capitulescences terminal or axillary, solitary, paniculate or corymbiform with cymose branches, sometimes spicate. Capitula discoid, homogamous, pedunculate or sessile, florets bisexual and fertile. Involucres with numerous, imbricate, persistent bracts. Florets purple to white, actinomorphic or zygomorphic, lobes 3–5, pubescent or glabrous. Anthers usually 5, purple to yellow or white, syngenesious bases usually calcarate. Styles purple to white, 2-branched, inner surface covered with stigmatic papillae, outer surface covered with sweeping hairs. Achenes subterete, clavate or obovate, 3–10-ribbed, carpopodium present or absent. Pappus present or absent; if present bristly or coroniform, in 1–2 series, persistent or deciduous. Pollen echinate or lophate, 3-porate, 6-porate or 3-colporate, with or without micropuncta.

Key to the genera

Key to the genera — S. Bunwong, P. Chantaranothai , S. Keeley

1		Corolla strongly zygomorphic, liguliform with single deepest sinus    2
–		Corolla actinomorphic, without single deepest sinus    3
2		Pappus of straight bristles    Elephantopus
–		Pappus of contorted bristles    Pseudelephantopus
3		Pappus absent    4
–		Pappus present    5
4		Achenes with 7–10 ribs; pollen lophate and sub-3-colporate    Iodocephalopsis
–		Achenes with 4–6 ribs; pollen non-lophate    Ethulia
5		Corolla 3- or 4-lobed; capitula appearing sessile; pappus thick and coroniform    Struchium
–		Corolla 5-lobed; capitula mostly pedunculate; pappus of bristles    6
6		Vines, scandent shrubs or trees    7
–		Herbs or subshrubs    11
7		Achenes less than 2.5 mm long; involucres less than 4 mm long; pollen not or weakly sublophate, with continuous perforated tectum between colpi    8
–		Achenes more than 2.5 mm long; involucre more than 4 mm long; pollen lophate, with or without continuous perforated tectum between colpi    9
8		Achenes glabrous; involucre glanduliferous; stems and leaves sericeous with long-armed T-shaped trichomes    Tarlmounia
–		Achenes pubescent; involucre eglanduliferous; leaves and stems not sericeous with T-shaped trichomes    Strobocalyx
9		Involucres 7–10 mm long; pollen psilolophate with high muri    Monosis
–		Involucres 4–5 mm long; pollen strongly echinate    10
10		Small trees or shrubs; corolla tubes broad, not closely investing the style shaft    Gymnanthemum
–		Scandent shrubs; corolla tubes slender, closely investing style shaft    Decaneuropsis
11		Pappus in one series, without strongly differentiated outer series    12
–		Pappus in 2 series    14
12		Plants leafless at anthesis; pappus persistent; pollen echinate, 3-colporate    Kurziella
–		Plants with persistent leaves; pappus caduceus; pollen lophate    13
13		Achenes obovate, without evident carpopodia; phyllaries not reflexed; pollen 6-porate    Camchaya
–		Achenes oblong; phyllaries reflexed; pollen 3-porate    Koyamasia
14		Pappus of flattened setae    Pulicarioidea
–		Pappus of capillary bristles not dilated at the base    15
15		Leaves and stems with T-shaped hairs    Cyanthillium
–		Leaves and stems without T-shaped hairs    16
16		Peduncles fistulose, 25–40 cm long    Okia
–		Peduncles not fistulose, mostly less than 15 cm long    Acilepis

Taxon Treatment

• Bunwong, S; Chantaranothai, P; Keeley, S; 2014: Revisions and key to the Vernonieae (Compositae) of Thailand PhytoKeys, 37: 25-101. doi