Roldana
in P. de La Llave and J. M. de Lexarza, Nov. Veg. Descr. 2: 10. 1825.
| Taxon | Illustrator ⠉ | |
|---|---|---|
 | Roldana hartwegii Psacalium decompositum Arnoglossum plantagineum | Yevonn Wilson-Ramsey Yevonn Wilson-Ramsey Yevonn Wilson-Ramsey |
Perennials or subshrubs [shrubs, or trees], [20–] 60–100 (–300) [–800] cm (caudices woody, fibrous-rooted, often woolly). Stems single or clustered, erect (glabrous or arachnose and glabrescent [tomentose to lanate]). Leaves mostly cauline (at flowering); alternate; petiolate; blades pinnati-palmately [pinnately or palmately] nerved, suborbiculate (proximal) to ovate or oblong (distal) [deltate, elliptic, lanceolate, orbiculate, or ovate], sinuately to angularly lobed (± polygonal) [palmately, pinnately, or not lobed], ultimate margins serrate to denticulate (lobes and denticles apiculate) or entire, abaxial faces glabrous or arachnose [tomentose to lanate] and glabrate, adaxial glabrous or glabrate [tomentose to lanate]. Heads radiate [disciform or discoid], in corymbiform or paniculiform arrays (peduncles usually arachnose). Calyculi 0 or of 1–3 (–5) [–13+] (linear [filiform to foliaceous]) bractlets. Involucres campanulate [hemispheric to cylindric or funnelform], 3–5 [–20+] mm diam. Phyllaries persistent, (5–) 8–13+ in 2 series, erect, distinct, lanceolate or lance-linear to linear (± navicular), equal, margins ± scarious. Receptacles flat, alveolate (margins of sockets raggedly toothed), epaleate. Ray-florets [0 or 3–] 5–8, pistillate, fertile; corollas yellow or yellow-orange [whitish or ochroleucous] (laminae usually oblong to elliptic). Disc-florets 6–30 [–100+], bisexual, fertile; corollas yellow or yellow-orange [whitish or ochroleucous], tubes shorter to longer than funnelform to campanulate throats, lobes 5, recurved, deltate to lanceovate; style-branches: stigmatic areas continuous, apices rounded-truncate. Cypselae ± columnar, [5-ribbed or] 10-ribbed, puberulent (between ribs) [glabrous]; pappi persistent (fragile), of 40–80+, white, barbellulate bristles in 1 series. x = 30.
Distribution
sw United States, Mexico, Central America
Discussion
Species ca. 50 (1 in the flora).
Selected References
None.
Lower Taxa
Property "Unknown range to" (as page type) with input value "of 1-3(-5)[-13+] bractlets" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.