Compilation
Phaseolus atropurpureus

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Name

Identification
Isotype of Phaseolus atropurpureus Sessé & Moçiño ex DC. [family FABACEAE ] (stored under name); Verified by 100103, 1861 Macroptilium atropurpureum (Moçiño & Sessé ex DC.) Urb. [family FABACEAE ] Verified by J. Torres-Colin (MEXU), 2008 Phaseolus atropurpureus Sessé & Moçiño ex DC. [family FABACEAE ] Verified by Not on Sheet,
Related name
  • Phaseolus schiedeanus
  • Macroptilium atropurpureus
  • Phaseolus lunatus
  • Phaseolus atropurpureus
  • Phaseolus alatus
  • Phaseolus semierectus
  • Macroptilium atropurpureum
  • Phaseolus sp.

Flora

Entry for Macroptilium atropurpureum Moç. & Sessé ex DC. Urb. [family LEGUMINOSAE]
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora Zambesiaca
Resource Type
Reference Sources
Entry From
FZ, Vol 3, Part 5, (2001) Author: B. Mackinder, R. Pasquet, R. Polhill and B. Verdcourt
Names
Macroptilium atropurpureum Moç. & Sessé ex DC. Urb. [family LEGUMINOSAE], Symb. Antill. 9: 457 (1928). —Verdcourt, Man. New Guinea Leg.: 505 (1979). —Lock, Leg. Afr. Check-list: 415 (1989). Type from Mexico.
Phaseolus atropurpureus DC. [family LEGUMINOSAE], Prodr. 2: 395 (1825).
Information
Trailing perennial herb. Stems rooting at the nodes, densely covered with fine retrorse hairs. Leaflets 3, 2–7 × 1.5–5 cm, ovate or ovate-rhombic, usually slightly lobed, the laterals oblique, with a single lobe on the outer side, pubescent above, silvery velvety beneath; petiole 0.5–5 cm long; stipules 4–5 mm long, ovate-acuminate, strongly veined. Inflorescences 10–30 cm long, the flowers in laxly inserted clusters above the long peduncle; bracteoles 2–3 mm long, linear. Calyx 7–8 mm long, tubular; lower lobes 2–3 mm long, narrowly triangular. Corolla 1.5–2.5 cm long, dark blackish-purple. Pods 7–8 cm long, 4–4.5 mm wide, linear, beaked, appressed pubescent, c. 12–15-seeded. Seeds marbled brown and black, 4 mm long, oblong-ellipsoid, pitted.
Habitat
known as Siratro, now widely used for pasture improvement and becoming naturalised in the midlands of Zimbabwe
Range
Native of tropical America
Altitude range
around 1300–1400 m.
1400
1300
Distribution
Zimbabwe C Christon Bank, fl. 11.vi.1988, Bayliss 10740 (MO; SRGH).Zimbabwe N Mazowe Dam, fl. 21.iii.1982, Pope & Polhill 2077 (K; SRGH).
Notes
There are a number of records from experimental stations, e.g. Zambia, Mt. Makulu Research Station, fl. & fr. 27.ii.1968, Fanshawe 10298 (K; NDO); Zimbabwe, Marondera (Marandellas), Grassland Research Station, fl. 10.iii.1961, Corby 962 (K; SRGH); Malawi, Lilongwe, Agricultural Research Station, fl. & fr. 11.iii.1966, Salubeni 429 (K).

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