Stylotrichium, Mattfeld, 1923

Amorim, Vivian Oliveira & Roque, Nádia, 2017, Stylotrichium hortensiae (Asteraceae-Eupatorieae): A new species from Chapada Diamantina, Bahia, Brazil, Phytotaxa 308 (2), pp. 283-288 : 287

publication ID

https://doi.org/ 10.11646/phytotaxa.308.2.10

persistent identifier

https://treatment.plazi.org/id/2718BF60-FFCF-FF89-2DBE-FD81F28BCB02

treatment provided by

Felipe

scientific name

Stylotrichium
status

 

Key to the species of Stylotrichium View in CoL

1. Cypselae epappose (pappus absent) ................................................................................................................................................ 2.

– Cypselae with pappus ...................................................................................................................................................................... 3.

2. Branches glanduliferous; laminae 1.2–1.8 × 0.7–1.2 cm, margins crenate, adaxial surface with glandular trichomes; paleae 1–2; corolla ca. 2.7 mm long, anther connective appendages obtuse; cypselae scabrous, densely sessile glandular trichomes, carpopodium annular, symmetrical, not decurrent into ribs ( Fig. 3F View FIGURE 3 ) ............................................................................................... S. sucrei View in CoL

– Branches scabrous to glabrescent; laminae 0.5–0.7 × 0.2–0.4 cm, margins entire, adaxial surface glabrous; paleae 4; corolla ca. 1.4 mm long, anther connective appendage emarginated; cypselae glabrous, rarely glabrescent, carpopodium terete, asymmetric, decurrent into ribs ( Fig. 3C View FIGURE 3 ) ....................................................................................................................................... S. glomeratum View in CoL

3. Laminae oblanceolate to oblong, 3.5–8 cm long; involucral bracts lanceolate; paleae 3–4; flowers 35–45, anther connective appendages as long as wide, style ca. 6.5 mm long; elements of the pappus 1–1.5 mm long ( Fig. 3D View FIGURE 3 ) ........................... S. hortensiae View in CoL

– Laminae obovate, orbicular or obtrullate, 0.4–3.3 cm long; involucral bracts oblong to oblanceolate; paleae 1–2; flowers 20–25; anther connective appendages wider than long, style 3.9–5 mm long; elements of the pappus 0.2–1 mm long ............................ 4.

4. Laminae broadly obovate to orbicular, 2.9 × 3.3 cm; cypselae 3-ribbed, pappus 0.2–0.6 mm long ( Fig. 3E View FIGURE 3 ) ........ S. rotundifolium View in CoL

– Laminae obovate to obtrulate, 0.4–1.5 × 0.2–1 cm; cypselae 5-ribbed, pappus 0.6–1 mm long .................................................... 5.

5. Leaves short petiolate (ca. 0.4 mm long), venation reticulodromous basal ( Fig. 3B View FIGURE 3 ) .................................................... S. edmundoi View in CoL

– Leaves sessile, venation reticulodromous suprabasal ( Fig. 3A View FIGURE 3 ) ................................................................................ S. corymbosum View in CoL

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