Gonatopus angustus N.E.Br.
  • Bull. Herb. Boissier, sér. 2, 1: 778 (1901) 


Notes: Distribution: Tanzania to S. Africa

General Description

Tuber turnip-shaped. Leaf solitary, erect, 1 1/2–4 1/2 ft. high, tripinnatipartite, glabrous; lowest branches 10–12 in. long, about 5 in. broad; leaflets or ultimate segments 1 1/4–3 in. long, 1 1/2–4 lin. broad, probably sometimes larger, linear or linear-lanceolate, acute, more or less decurrent at the base, not articulated to the rhachis. Peduncle 2–3 in. long, smooth. Spathe glabrous; tube 1–1 1/4 in. long, oblong-ovoid; limb about 3 in. long, and 1 1/4 in. broad, reflexed, oblong, cuspidate. Spadix sessile, shorter than the spathe; female part 8–9 lin. long, about 1/3 in. diam. cylindric; male part about 2 1/2 in. long, cylindric, obtuse, its basal portion for about 8 lin. constricted to about half the thickness of the upper portion and covered with abortive flowers. Perianth-segments oblong, truncate at the angular apex. Ovary ovoid, narrowed into a short stout style, 2-celled; stigma rather large, peltate, exserted just beyond the perianth-segments. Stamens in the male flowers 4, connate into a tube around an abortive ovary and equalling it in length, entirely absent in the female flowers.

Tuber horizontal and cylindric (especially in S. African material), rarely subglobose, 5–20 cm. long, 2–4 cm. in diameter. Leaf 20–65 cm. tall, glabrous; petiole 10–40 cm. long, dull green; pulvinus basal, cylindric, hidden by cataphylls; blade bi- to quad-ripinnate, 15–30 cm. broad; node of basal pair of pinnae usually bearing subsidiary leaflets or pinnae; ultimate leaflets 1–9 cm. long, 0.1–2(–4.5) cm. broad, linear to broadly elliptic, acuminate, ± narrowed basally, usually sessile or decurrent. Inflorescences usually solitary, rarely in pairs, appearing just before leaf. Peduncle 3–13 cm. long, 0.5–0.6 cm. in diameter, terete. Spathe 4–6.5 cm. long; tube broadly ovoid, constricted apically, 1.1–1.4 cm. long, 1.2–1.3 cm. in diameter, outside light yellowish green with darker green speckling, paler within; limb broadly elliptic, 2.5–5 cm. long, 2.3–3 cm. broad, cuspidate, reflexing at maturity, pale brown with darker veins on outside. Spadix 3.9–5.3 cm. long; staminate part cylindric to clavate, 2.5–4 cm. long, 0.8 cm. in diameter, white, apex rounded, constricted at base; sterile intermediate part conic, 0.7–0.8 cm. long, 0.4–0.5 cm. in diameter at narrowest point, white; pistillate part shortly subcylindric, 0.7–0.8 cm. long, 1 cm. in diameter. Staminate flower: tepals usually 4 (rarely 5 or 6). Pistillate flower: tepals light green; staminodes 0–1, subcylindric; ovary ± laterally compressed, 2-locular; locules uniovulate, placentas at base of septum; stigma discoid, 1–1.5 mm. in diameter, dark green. Infructescence shortly cylindric. Berry ovoid, 1–1.8 cm. long, 1.4–1.5 cm. in diameter, 1–2-seeded, orange to yellow. Seed ovoid-elliptic, 1 cm. long, 0.7 cm. in diameter.

Habitat

HAB. Forest; approx. 200–1000 m.

Distribution

Tanzania Kanga to Dakawa, Peter 15023† & Kisauke [Kissauke] to Kanga, Peter 14698†

British Central Africa Zambesi Valley; in copses on mountains near Boruma, Menyharth, 922 bis!

Literature

in Bull. Herb. Boiss., sér. 2, 1: 778 (1901) & in F.T.A. 8: 197 (1901); Engl. in E.P. 21 (IV.23B): 308 (1905) & in V.E. 2: 241 (1908); Peter in Nachr. Ges. Wiss. Göttingen, Math.-Phys. Kl. 1929 (3): 209 (1930).

Distribution Map

 
  • Native distribution
Found in
  • Africa East Tropical Africa Tanzania
  • South Tropical Africa Malawi
  • Mozambique
  • Zimbabwe
  • Southern Africa KwaZulu-Natal
  • Northern Provinces
  • Swaziland

  Bibliography

  • 1 Haigh, A. & Boyce, P.C. (2012). Flora Zambesiaca 12(1): 1-54. Royal Botanic Gardens, Kew.
  • 2 Strugnell, A.M. (2006). A checklist of the Spermatophytes of Mt. Mulanje, Malawi. Scripta Botanica Belgica 34: 1-199.
  • 3 Govaerts, R. & Frodin, D.G. (2002). World Checklist and Bibliography of Araceae (and Acoraceae): 1-560. The Board of Trustees of the Royal Botanic Gardens, Kew.
  • 4 (By N. E. Brown.) (1902) Aroideæ. Flora of Tropical Africa 8 (0)

 Information From

Flora of Tropical East Africa
http://apps.kew.org/efloras/
Flora of Tropical East Africa. Published on the Internet; http://apps.kew.org/efloras/
Flora of Tropical Africa
http://apps.kew.org/efloras/
Flora of Tropical Africa. Published on the Internet; http://apps.kew.org/efloras/
WCS higher taxonomy
  • C All Rights Reserved
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
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