Checklist of Bolivian Compositae - Royal Botanic Gardens, Kew

Pseudonoseris discolor (Muschl.) H. Rob. & Brettell, Phytologia 28(1): 60 (1974).
Onoseris discolor Muschl., Bot. Jahrb. Syst. 50(2/3), Beibl. 111: 94 (1913). Type: ‗Peruvia: Inter Sandia et
Cuyocuyo ad rupes, 2600–2800 m s. m. (WEBERBAUER n. 883. – Florens 1. Maii 1902).‘ Holotype: Bú.
Liabum lanatum Ferreyra, Bol. Soc. Peru Bot. 1: 17 (1948), as nom. nov. pro Onoseris discolor Muschl.
Bolivia (La Paz), Peru.
Amongst rocks, path edges, roadsides, scrub/woodland margins.
2600–3450 m.
April–June.
La Paz: Fuentes & Cuevas 8624 (K); Fuentes et al. 10422 (K).
Psila Phil., Anales Mus. Nac. Chile, Secc. 2, Bot. 7: 36 (1891) = Baccharis L.
Psila boliviensis (Wedd.) Cabrera, Bol. Soc. Argent. Bot. 5(4): 210 (1955) = Baccharis boliviensis (Wedd.)
Cabrera
Psila boliviensis (Wedd.) Cabrera var. latifolia (R. E. Fr.) Cabrera, Bol. Soc. Argent. Bot. 5(4): 210 (1955) =
Baccharis boliviensis (Wedd.) Cabrera
Psila brachylaenoides (DC.) Aristeg., Fl. Venez. 10(1): 316 (1964) = Baccharis oblongifolia (Ruiz & Pav.) Pers.
Psila trinervis (Pers.) Cabrera, Bol. Soc. Argent. Bot. 5(4): 211 (1955) = Baccharis trinervis Pers.
Psilopogon Phil., Linnaea 33(1): 126 (1864) = Picrosia D. Don
Psilopogon albiflorus Phil., Linnaea 33(1): 126 (1864) = Picrosia longifolia D. Don
Pterocaulon Elliott, Sketchb. Bot. S.- Carolina Georgia 2: 323 (1823).
Monenteles Labill., Sertum Austrocal. : 43 (1825). Type: not designated.
Chlaenobolus Cass., Dict. Sci. Nat. 49: 337 (1827). Type: not designated.
Type: Conyza pycnostachya Michx. = Pterocaulon pychnostachyum (Michx.) Elliott
References
Cabrera, A. L. & A. M. Ragonese. (1978). Revisión del género Pterocaulon (Compositae). Darwiniana 21(2–4):
185–257.
Malme, G. O. A:N (1901). Beiträge zur kenntnis der Südamerikanischen arten der Gattung Pterocaulon Ell.
Bihang Kongl. Svenska Vetenskapsakad. Handl. 27(3, 12): 1–27 + Tab. I–IV. (1901).
Key to species
1. Leaves lannose or tomentose on both surfaces, never grey tomentose P. lanatum
Leaves more or less glabrescent above and densely grey tomentose beneath 2
2. (1) Glomerules in lax panicles, with internodes clearly visible in inflorescence P. virgatum
Glomerules in dense spikes, simple or branched, internodes not visible in inflorescence 3
3. (2) Spikes short, 4–8 cm long, ovoid, frequently solitary; lower leaves 15–35 mm wide
P. purpurascens
Spikes much longer, cylindrical 4
4. (3) Leaves oblanceolate or linear, 10–20 mm wide; male florets 2–5 per capitulum P. lorentzii
Lower leaves obovate-elliptic, 18–40 mm wide; upper leaves ovate-oblong; male florets 1–3
per capitulum
P. alopecuroides
*Pterocaulon alopecuroides (Lam.) DC., Prodr. 5: 454 (1836).
Conyza alopecuroides Lam., Encycl. 2: 93 (1786). Types: ‗On trouve cette plante à le Martinique, dans les prés
qu‘on nomme Savannes. M. Commerson l‘a observé au Brésil. K. (v.s. in h. Juss.) … Elle croît aux Antilles.
(v.s.)‘. Lectotype (effectively selected by Cabrera & Ragonese, 1978: 208 as holotype): ‗Martinique‘ (without
any other details), P – see following note. Note: In P-LA there is one sheet 315/4 (from Martinique) that
corresponds to this species, although doubtless there is a corresponding sheet in P-JU; this distinction was
not made by Cabrera & Ragonese.
Chlaenolobus alopecuroides (Lam.) Cass., Dict. Sci. Nat. 49: 339 (1827).
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