Checklist of Bolivian Compositae - Royal Botanic Gardens, Kew

4. (3) Leaves 9–11 cm long by 3–4 cm wide, tomentose beneath; inflorescences paniculate;
phyllaies 14
P. cardenasii
Leaves 2–8 cm long by 1.5–4 cm wide, glabrous above and beneath 5
5. (4) Leaves ovate or ovate-oblong, usually with a cordate base, margins crennate-dentate;
phyllaries 8 (–13)
P. dictyophlebius
Leaves ovate-elliptic, base attenuate or rounded, margins entire; phyllaries 13 P. tablensis
6. (2) Leaf margins serrate; phyllaries 13 7
Leaf margins entire 9
7. (6) Petioles 2–2.5 cm long Senecio croicensis
Petioles 1–10 mm long 8
8. (7) Leaf bases rounded; pedicels 15–25 mm long; inflorescence of lax panicles P. yungasensis
Leaf bases cuneate; pedicels 5–15 mm long; inflorescence of dense panicles P. chulumanicus
9. (6) Ray limbs very short or absent, not exceeding disc florets; leaves lanceolate P. jelskii
Ray limbs well-developed, exceeding disc florets 10
10. (9) Involucre 6 mm tall 11
Involucre 3.5–4 mm tall 12
11. (10) Stems more or less floccose; involucre 6 mm diam. P. floccosa
Stems not floccose; involucre 4 mm diam.
P. epiphytica
12. (10) Leaves elliptic-lanceolate, 6–11 cm long by 2.5–4 cm wide; involucres 3.5–4 mm tallP. miguelii
Leaves ovate or elliptic; involucre 3 mm tall 13
13. (12) Phyllaries 8–9; leaves elliptic or ovate, 8–9 cm long by 4–6 cm wide P. psidiifolia
Phyllaries 11–13; leves ovate, 5–9 cm long by 2.5–4.5 cn wide
P. brittoniana
14. (1) Leaves densely tomentose beneath 15
Leaves somewhat lanuginose or glabrous beneath 17
15. (14) Leaf margins entire P. marinii
Leaf margins dentate 16
16. (15) Involucre glabrescent; leaves white-tomentose beneath P. herzogii
Involucre and underside of leaves yellowish-brown tomentose
P. oronocensis
17. (14) Leaf margins short-denticulate 18
Leaf margins entire 19
18. (17) Leaves lanceolate, 2–3 cm wide, reticulate venation conspicuous/prominent beneath P. beckii
Leaves elliptic, 3.5–5 cm wide, venation inconspicuous beneath
P. sailapatensis
19. (17) Leaves lanceolate; involucre 5 mm tall P. jelskii
Leaves ovate 20
20. (19) Involucre 4 mm tall; leaves 3.5–6 cm wide P. comarapensis
Involucre 5–6 mm tall; leaves 1.5–3 cm wide
P. subglomerosa
Pentacalia beckii (Cabrera) Cuatrec., Phytologia 69(5): 314 (1990).
Senecio beckii Cabrera, Hickenia 2(4): 15 (1984). Type: ‗Bolivia. Deptro. La Paz, Prov. Nor Yungas, La Paz 65
km hacia Coroico. 2700 m s.m. Bosque temporalmente nebuloso en zona de nubes, leg. St. G. Beck No 1822,
28-VII-1979‘. Holotype: SI.
Bolivia (La Paz).
Cloud forest.
2000–2700 m.
July–October.
Pentacalia brittoniana (Hieron.) Cuatrec., Phytologia 49(3): 244 (1981).
*Senecio sprucei Britton, Bull. Torrey Bot. Club 19(9): 265 (1892), non Klatt (1888). [Types: ‗Yungas, 4,000 ft.
([Rusby] 1695). The same as Spruce’s No. 4811.‘] Syntype (Rusby 1695): NY (00259413/00259419). Note: The
NY material of Rusby 1695 is marked with two bar codes for some reason, possibly because of Cabrera‘s
lectotypification of Hieronymus‘s name. Syntype (Spruce 4811): NY (00259125).
*Senecio brittonianus Hieron., Bot. Jahrb. Syst. 29(1): 72 (1900), as nom. nov. pro S. sprucei Britton. ‗Lectotype‘
(selected by Cabrera , 1985: 100): Rusby 1695, NY (see specimens cited above).
Bolivia (La Paz).
Bosque yungueño.
1200–1400 m.
417