Ipomoea pogonantha

Nomenclature

Accepted name/Authority/Place of publication: 

Ipomoea pogonantha Thulin in Nord. J. Bot. 23: 629–640 (2005). Type: Somalia, Bay region, 31 km S of Baidoba on Dinsor road, 2"55'N, 43"28'E, 11-12 Jun 1983, Gillett & Hemming 24675 (K holotype).

Description

Habit: 
Woody climber, up to at least 3 m tall, often flowering when leafless; stems up 5 m long, rough, ±muricate, ± densely puberulent when young, with usually retrorse ± appressed hairs to subglabrous, young stems pale brown to purplish brown, older stems greyish.
Leaves: 
alternate, often clustered if on short-shoots; lamina ovate-triangular to reniform, 1–8.5 x 1–7 cm; base truncate to cordate; apex acuminate and mucronulate or cuspidate; margins entire; lower leaf surface adpressed or assurgent ± sparsely pubescent, rarely only hairy on the veins; upper surface adpressed or assurgent ± densely pubescent; petiole 0.4–3.7 cm long, sparsely to ± densely pubescent with usually retrose ± adpressed hairs.
Inflorescences: 
Flowers solitary or in 1–3(–several)-flowered cymes, open in the morning only; peduncle 1–3 mm long, pubescent to subglabrous; pedicels (3–)5–15 mm long, glabrous to sparsely pubescent, thickened towards the apex; bracts ovate-triangular, acute to subacute, 1–4 mm long, glabrous to sparsely pubescent, caduceus or somewhat persistent during anthesis.
Flowers: 
Sepals subequal to unequal, broadly elliptic-oblong to suborbicular, (3–)6–12 x (2.5–)4–7.5 mm, apex obtuse to truncate and mucronulate, margin hyaline, glabrous or minutely ciliate. Corolla creamy white to pale yellow, yellow-green or peachy-coloured with purple centre; infundibular or narrowly campanulate (3–)4–6 cm long, tube constricted at the base; glabrous except for densely ciliate margin. Stamens unequal, 3 short, 2 longer; anthers 4–6 mm long; filaments 4–10 mm long, hairy at the base. Style equalling anthers in length; stigmas globular.
Fruits: 
Capsule ovoid-rounded, 8–17 mm long, glabrous, brown, 4-valved.
Seeds: 
± ovoid, c. 5 x 3 mm long, somewhat angular, black, tomentose with whitish c. 0.5 mm long hairs.
Author: 
Mats Thulin
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.

Thulin, M. 2005. Notes on Convovulus, Astripomoea, Ipomoea and Merremia (Convovulaceae) from the Horn of Africa. Nordic Journal of Botany 23: 629–640.

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Kenya, Ethiopia, Somalia.

Ecology: 

Acacia-Commiphora and Combretum-Terminalia woodland on red soil over limestone; 280–1800 m. 

Phenology: 

Number of collections seen: 13

months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

# flowering  specimens

2

3

1

3

# fruiting specimens
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.

Thulin, M. 2005. Notes on Convovulus, Astripomoea, Ipomoea and Merremia (Convovulaceae) from the Horn of Africa. Nordic Journal of Botany 23: 629–640.

Other information

Common names and uses: 
Bar-her-gis (Somalia), Rubissa (Somali).

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 pogonantha

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