Compilation
Radinosiphon leptostachya

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Name

Identification
Radinosiphon leptostachya (Baker) N.E.Br. [family IRIDACEAE ]
Related name
  • Radinosiphon leptostachya

Flora

Entry for RADINOSIPHON leptostachya (Baker) N.E. Br. [family IRIDACEAE]
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (1996) Author: Peter Goldblatt
Names
RADINOSIPHON leptostachya (Baker) N.E. Br. [family IRIDACEAE], in Trans. Roy. Soc. S. Afr. 20: 263 (1932); S. Carter in Fl. Pl. Afr. 35, t. 1384 (1962); Cribb & Leedal, Mountain Fl. S. Tanz.: 177, t. 49C (1982); Goldblatt in F.Z. 12(4): 65 (1993). Type: South Africa, Mpumalanga [Eastern Transvaal], Mac Mac, Mudd (K, holo.!)
Lapeirousia leptostachya Baker [family IRIDACEAE], Handb. Irid.: 170 (1892)
Lapeirousia holostachya Baker [family IRIDACEAE], in K.B. 1894: 391 (1894) & in F.T.A. 7: 354 (1898). Type: Zambia, Lake Tanganyika, Fwambo, Carson 14 (K, holo.!)
Tritonia acroloba Harms [family IRIDACEAE], in E.J. 30: 278 (1901). Type: Tanzania, eastern Livingstone Mts., Ubena, Goetze 814 (B, holo.!)
Acidanthera leptostachya (Baker) N.E. Br. [family IRIDACEAE], in K.B. 1921: 297 (1921)
Acidanthera holostachya (Baker) N.E. Br. [family IRIDACEAE], in K.B. 1921: 297 (1921)
Acidanthera lomatensis N.E. Br. [family IRIDACEAE], in K.B. 1921: 298 (1921). Type: South Africa, Mpumalanga [Eastern Transvaal], Barberton District, Lomati valley, Thorncroft 1065 (K, holo.!)
Radinosiphon holostachya (Baker) N.E. Br. [family IRIDACEAE], in Trans. Roy. Soc. S. Afr. 20: 263 (1932)
Radinosiphon lomatensis (N.E. Br.) N. E. Br. [family IRIDACEAE], in Trans. Roy. Soc. S. Afr. 20: 263 (1932)
Radinosiphon cameronii N.E. Br. [family IRIDACEAE], in Trans. Roy. Soc. S. Afr. 20: 263 (1932). Type: Malawi, summit of Chiradzulu, Cameron 179 (K, holo.!)
Information
Plants (8-)15-50 cm. high. Corms 1.2-1.5 cm. diameter, the tunics pale, usually membranous. Foliage leaves several, mostly basal, and reaching to ± the base of the spike, sometimes shortly exceeding the stems, narrowly lanceolate, 8-15 mm. wide, blades plane with lightly raised margins and midrib, cauline leaves progressively reduced in size above. Stem simple or with 1-3 branches. spike (2-)4-12 or more-flowered; bracts 8-12 mm. long, green or somewhat membranous to dry apically, the inner ± 2/3 as long as the outer. Flowers pink to purple; perianth-tube 2-3 cm. long, narrowly cylindric; tepals unequal, the dorsal 1-1.2 cm. long, arched over the stamens, the lower 8-11 mm. long, narrower than the dorsal, streaked darker pink in the midline. Filaments 5-6 mm. long, exserted ± 3 mm. from the tube; anthers 3-5 mm. long. Style dividing opposite or beyond the anthers, the branches filiform. Capsules globose, 4-5 mm. long. Fig. 11/4-7.
Range
DISTR. T 4, 7, 8;
Altitude range
1800-2200 m.
Distribution
TANZANIA Ufipa District Mmemya Mt., 20 Feb. 1951, Bullock 3711!;TANZANIA Iringa District Sao Hill, Jan. 1960, Watermeyer 238!;TANZANIA Songea District Matagoro Hills S. of Songea, 22 Feb. 1956, Milne-Redhead & Taylor 8864!
Distribution (external)
Zambia
Malawi
Mozambique
Zimbabwe
South Africa (Northern Province Mpumalanga)
Swaziland
Notes
S. Carter united the four SPECIES of Radinosiphon recognized by N.E. Brown under R. leptostachya. This seems advisable as there seem to be no major morphological differences between populations that merit SPECIES separation. Different populations do, however, maintain their differences in overall robustness and perianth size, tube length, and tepal width in cultivation, indicating that there is a genetic basis to some of the variation.

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