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Compilation
Isolona heinsenii

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[family ]
Type of Isolona heinsenii Engl. & Diels [family ANNONACEAE]
[family ]
[family ]
Isotype of Isolona heinsenii Engl.&Diels [family ANNONACEAE]
Isotype of Isolona heinsenii Engl.&Diels [family ANNONACEAE]
Isotype of Isolona heinsenii Engl. & Diels [family ANNONACEAE]
Type of Isolona heinsenii Engl. & Diels [family ANNONACEAE]
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Name

Identification
Isolona heinsenii Engl. & Diels [family ANNONACEAE ] (stored under name); Verified by Not on sheet.,
Related name
  • Isolona heinsenii
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Flora

Entry for ISOLONA heinsenii Engl. & Diels [family ANNONACEAE]
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, (1971) Author: B. Verdcourt
Names
ISOLONA heinsenii Engl. & Diels [family ANNONACEAE], in N.B.G.B. 2: 300 (1899) & in E.M. 6: 84, t. 27/D (1901); T.T.C.L.: 42 (1949). Type: Tanganyika, E. Usambara Mts., Derema [Nderema], Heinsen 19 (B, holo., K, iso.!)
Information
Shrub or small to medium-sized tree 3–15 m. tall; branches spreading horizontally; bark grey; young branchlets pubescent with short spreading greyish or brownish hairs. Leaf-blades oblanceolate-oblong, elliptic-oblong or obovate-oblong, 4.6–22 cm. long, 1.7–8.3 cm. wide, acuminate at the apex, rounded or cuneate at the base, thin, glabrous above save on the midrib, silky beneath in very young buds, but soon glabrous save for the midrib; lateral nerves 12–16; petioles 4–6 mm. long, pubescent. Flowers solitary or paired, axillary, pendulous; pedicels 5–7 mm. long, brownish hairy; bracteoles several, ovate, up to ± 2 mm. long, 1 mm. wide. Sepals triangular, 3.5–4 mm. long, 2.5–3 mm. wide. Corolla at first green, later waxy yellow, sometimes reddish at base (fide Engl. & Diels); tube urceolate, 5 mm. long, 8 mm. wide, glabrous inside, spreading puberulous outside; lobes spreading, but recurving at the tips, 1.2–2.8 cm. long, 3–5 mm. wide, gradually tapering from base to apex, margins reflexed, sometimes misshapen and curved horizontally, glabrous outside, spreading puberulous inside. Stamens ± 1 mm. long. Ovary ovoid-conic, 2.8 mm. long, 1.5 mm. in diameter. Fruiting pedicels up to 1.5 cm. long; fruit dark green, heavily speckled with white or yellow when quite ripe, fusiform, 6–10 cm. long, 2.4–2.7 cm. wide, narrowed to both ends, with 6 broad moderately raised longitudinal ribs, glabrous, but with minute orange gland dots in the dry state; pericarp thin. Seeds irregularly ellipsoidal, 1.5–1.8 cm. long, 0.9–1 cm. wide, 7–8 mm. thick. Fig. 29, p. 126.
Range
DISTR. T3, 6 not known elsewhere
Altitude range
800–960 m.
Distribution
TANGANYIKA Lushoto District between Derema [Nderema] and Amani, Kwamkuyu/ Dodwe Falls, 27 Dec. 1956, Verdcourt 1742! & Amani Laboratory Plantation 11, 23 Jan. 1933, Greenway 3335 ! & 1.6 km. NNE. of Amani, above the Amani–Menga road, 23 July 1953, Drummond & Hemsley 3415!;TANGANYIKA Ulanga District Magombera Forest Reserve, 3 Nov. 1961, Semsei 3383 !

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