Ipomoea donaldsonii

Nomenclature

Accepted name/Authority/Place of publication: 

Ipomoea donaldsonii Rendle in J. Bot. 34: 37 (1896). Type: Ethiopia, Schebeli (Shebelle) river valley, Donaldson Smith 26 (BM lectotype). 

Description

Habit: 
Erect shrub or shrublet up to 1–3 m tall, occasionally with scandent branches, branchlets pointed and often becoming ± spinescent with age; stems black or dark brown, young stems shortly lanate, older stems with bark peeling off.
Leaves: 
Mostly on short-shoots; lamina reniform to spathulate, 2–14 x 3–20 mm; base cordate to truncate; apex obtuse or emarginate; pubescent beneath; upper surface variable, from glabrous to pilose; petiole pubescent, 2– 16 mm long.
Inflorescences: 
Solitary flowers axillary or a few together on short shoots; sessile or with peduncle up to 15 mm long; bracts minute and soon falling.
Flowers: 
Sepals ovate to suborbicular, obtuse, glabrous or pubescent, margins ciliate, the outer 2–4 x 2–3.5 mm, the inner 3–5 x 2–4 mm. Corolla purple or white, if white with purple or mauve centre, silvery pubescent on the midpetaline areas, broadly infundibular 1.5–3 cm long.
Fruits: 
Capsule ovoid, 4-valved, 7–9 mm long.
Seeds: 
Ovoid, c. 6 x 3–5 mm, densely covered with 5–10 mm long yellowish hairs.
Author: 
Javier A. Luna
References: 

Demissew, S. 2006. Convolvulaceae. In: Hedberg, I., E. Kelbessa, S. Edwards, S. Demissew and E. Persson (eds.), Flora of Ethiopia and Eritrea, vol. 5, pp. 227–231. The National Herbarium Addis Ababa University and The Department of Systematic Botany Uppsala University; Addis Ababa, Ethiopia and Uppsala, Sweden. 

Garcia, M.A., S. Demissew, M. Thulin. 2006. Convovulaceae. In: Thulin, M. (ed.), Flora of Somalia, vol. 3, pp. 227–228.Kew Publishing, Richmond. 

Verdcourt, B. 1963. Convolvulaceae. In: Hubbard, C.E. and E. Milne-Redhead (eds.), Flora of Tropical East Africa, pp.144–145. Crown Agent for Overseas governments and administrations, London. 

Verdcourt, B. 1978. Corrections and Additions to the 'Flora of Tropical East Africa: Convolvulaceae': IV. Kew Bulletin 33(1): 159–168.

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Kenya, Ethiopia, Somalia.

Ecology: 

Acacia-Commiphora bushland on sandy or stony ground; 150–1800 m. 

Phenology: 

Number of collections seen: 65

months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

# flowering  specimens

3

2

2

2

6

2

2

2

6

7

5

# fruiting specimens

1

1

1

1

6

 

Author: 
Javier A. Luna
References: 

Demissew, S. 2006. Convolvulaceae. In: Hedberg, I., E. Kelbessa, S. Edwards, S. Demissew and E. Persson (eds.), Flora of Ethiopia and Eritrea, vol. 5, pp. 227–231. The National Herbarium Addis Ababa University and The Department of Systematic Botany Uppsala University; Addis Ababa, Ethiopia and Uppsala, Sweden. 

Garcia, M.A., S. Demissew, M. Thulin. 2006. Convovulaceae. In: Thulin, M. (ed.), Flora of Somalia, vol. 3, pp. 227–228.Kew Publishing, Richmond. 

Verdcourt, B. 1963. Convolvulaceae. In: Hubbard, C.E. and E. Milne-Redhead (eds.), Flora of Tropical East Africa, pp. 144–145. Crown Agent for Overseas governments and administrations, London. 

Other information

General comments: 

In the wild theleaves are 2–14 x 3–20 mm, however cultivated specimens (Verd. s.n. K) can reach up to 24 x 37 mm. 

Authorship for webpage

Editor: 
Javier A Luna, Mark A. Carine, Sebsebe Demissew.
Contributors: 
Acknowledgements: 
This species page was produced as part of the project ‘Expanding the scope of African Digital Plant Resources’ funded by the World Collections Programme.
Classification: 
Ipomoea donaldsonii

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