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Compilation
Psorospermum baumii

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Psorospermum baumii Engl. [family GUTTIFERAE]
Isotype of Psorospermum baumii Engl. [family HYPERICACEAE]
Isotype of Psorospermum baumii Engl. [family GUTTIFERAE]
Isotype of Psorospermum baumii Engl. [family GUTTIFERAE/CLUSIACEAE]
Isotype of Psorospermum baumii Engl. [family GUTTIFERAE]
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Name

Identification
Isotype of Psorospermum baumii Engl. [family GUTTIFERAE ] Verified by Robson,N.K.B., 1957 Psorospermum tenuifolium Hook. [family GUTTIFERAE ] (stored under name); Psorospermum albidum (Oliv.) Engl. [family GUTTIFERAE ]
Related name
  • Psorospermum albidum
  • Psorospermum tenuifolium
  • Psorospermum febrifugum
  • Psorospermum baumii

Flora

Entry for Psorospermum baumii Engl. [family GUTTIFERAE]
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora Zambesiaca
Resource Type
Reference Sources
Entry From
FZ, Vol 1, Part 2, page 378, (1961) Author: N. K. B. Robson
Names
Psorospermum febrifugum [family GUTTIFERAE], sensu Eyles in Trans. Roy. Soc. S. Afr. 5: 420 (1916) pro parte quoad specim. Rogers 7259. — Exell & Mendonça, C.F.A. 1, 1: 123 (1937) pro parte.
Vismia corymbosa [family GUTTIFERAE], sensu Eyles, loc. cit.
Psorospermum tenuifolium [family GUTTIFERAE], sensu R.E.Fr., Wiss. Ergebn. Schwed. Rhod.-Kongo-Exped., 1: 151 (1914).
Psorospermum albidum [family GUTTIFERAE], sensu Engl. & Gilg in Warb., Kunene-Samb.-Exped. Baum: 306 (1903).
Psorospermum baumii Engl. [family GUTTIFERAE], Bot. Jahrb. 55: 383 (1919). Type from Angola (Bié).
Information
Shrub or small tree 1–5 m. high, much branched, with bark often peeling and exuding resin. Stems quadrangular at first, eventually terete, glabrous or ± densely rusty-tomentose when young but later always glabrous. Leaves membranous, strictly opposite, petiolate; lamina 2·5–7·5 × 1·5–4 cm., elliptic or oblong to obovate, rounded to obtuse or slightly acuminate at the apex, cuneate or attenuate at the base (never rounded), glabrescent or with a persistent sparse rusty indumentum on the midrib below and rarely also on the lamina, glossy, dark to light green above, concolorous or paler green below (never whitish), with the tertiary venation not prominent and usually inconspicuous below, with dark glandular dots usually ± confined to the apex and margins; petiole 3–8 mm. long, glabrous or rusty-tomentose. Inflorescence terminating main or lateral shoots, cymose, appearing paniculate, few- to many-flowered, pedunculate, with branches quadrangular, ± rusty-tomentose. Sepals (2·5) 3–4 mm. long, elliptic to lanceolate, rusty-tomentose outside, usually glabrescent. Petals up to 6 mm. long, elliptic to obovate, white or yellowish-white streaked with dark purple-red. Fasciclodes glabrous, spathulate, truncate or apiculate. Stamens 5–6 per fascicle; filaments glabrous or sparsely villous. Berry crimson, c. 6 mm. in diam. Seeds c. 3 mm. long.
Habitat
In riverine forest edges and open woodland, or in bush on Kalahari Sand.
Distribution
Zambia S Livingstone, fl. i.1910, Rogers 7245 (K).Zambia W Mwinilunga Distr., near source of Matonchi R., fl. 7.x.1937, Milne-Redhead 2615 (BM; K; PRE).Zambia N Mporokoso, Pansa R. east of boma, fl. & fr. 6.x.1949, Bullock 1148 (BM; K).Zambia B 16 km. N. of Senanga, fl. 31.vii.1952, Codd 7294 (BM; K; PRE; SRGH).
Distribution (external)
Angola (Bié)
Belgian Congo (Katanga)
Notes
P. baumii appears to be related to P. tenuifolium Hook. f., a species of hygrophilous forests in W. Africa, Cameroons and the Belgian Congo; but in P.baumii the leaves are generally smaller and less distinctly acuminate, the pedicels stouter and the sepals larger than in P. tenuifolium, which also has a completely glabrous inflorescence.P. baumii differs from P. febrifugum essentially in the shape of the leaves, the distinctness of the reticulation beneath, the shape of the leaf-base and the length of the petiole.

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