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This species is accepted, and its native range is Socotra.


Demissew, S. & Mill, R.R. (2009). Revision of the genus Seddera (Convolvulaceae). Kew Bulletin 64: 197.

Soqotra, on the plains, Feb. – March 1880, Balfour, Cockburn & Scott 73 (lectotype K, selected here by Sebsebe Demissew).
Morphology General Habit
Shrub to 60 cm high and 60 – 90 cm (or more) in diameter
Morphology General Indumentum
Young branches and leaves silvery white, pubescent; older parts brown, glabrescent with few hairs, persisting
Morphology Leaves
Leaf blades linear-lanceolate, 2 – 6 × 0.3 – 1.1 (– 2) mm, acute at the apex, shortly cuneate at the base Leaves sessile
Morphology Reproductive morphology Flowers
Flowers axillary, solitary; peduncles and pedicels absent; bracts leaf-like, 2 – 3 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx tubular-ellipsoid, 3.5 – 5.5 mm, constricted at the mouth; apical part of lobes c. 0.5 mm, flared outwards Sepals unequal, ovate to ovate-elliptic, concave, overlapping, 5 – 7 × 2 – 3 mm, inner ones ± glabrous, outer ones pubescent, acute at the apex
Morphology Reproductive morphology Flowers Corolla
Corolla white, 5.5 – 7 mm long, pilose on exserted portion only of tube and on mid-petaline areas
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 5, ± equal, widened towards the base and with glandular hairs, 4 – 5 mm long; anthers 0.8 – 1.5 mm long
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary glabrous, enveloped by a disc; style apparently simple but readily separable into 2 halves, 4 mm long, just exserted from the corolla tube, with ± obovoid stigma lobes 0.8 – 1 mm long
Morphology Reproductive morphology Fruits
Capsule included within calyx, c. 3 mm; seeds not seen.
Endemic to Yemen; known only from the island of Soqotra.
Sandy ground; sea level – 30 m.
Vulnerable. Rare with a very limited area of occupancy.
Flowering time: February to April; August and September.
This species, we believe, is closer to the genus Convolvulus than to Seddera, although Verdcourt (1971) argued against this. He described the stigma as ± globose, but the stigmas we observed were linear-oblong. Thus, the apparently simple style with linear-oblong stigma (although slightly broader than other species) will keep the species closer to Convolvulus than to Seddera. Verdcourt indicated that the simple style can be separated into two halves down to the apex of the ovary and we have confirmed this by dissection. Verdcourt keeps this species in Sect. Socotroseddera Verdc. along with S. spinosa. The ovary is glabrous and is enclosed within a disk.


The species is a very nutritious source of goat fodder and increases their milk yield; it also makes the milk sweet (Miller & Morris 2004).

Native to:


Convolvulus socotranus Verdc. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1997 unknown [273], Socotra Seddera fastigiata K000405903 syntype
Jan 1, 1997 Schweinfurth, G. [249], Socotra Seddera fastigiata K000405904
Jan 1, 1997 Bent [s.n.], Socotra Seddera fastigiata K000405905
Jul 1, 1969 unknown [73], Socotra Seddera fastigiata K000405906 syntype

First published in Kew Bull. 12: 344 (1957)

Accepted by

  • Wood, J.R.I., Williams, B.R.M., Mitchell, T.C., Carine, M.A., Harris, D.J. & Scotland, R.W. (2015). A foundation monograph of Convolvulus (Convolvulaceae) PhytoKeys 51: 1-282.
  • Luna, J.A., Sebsebe Demissew, Darbyshire, I., & M.A. Carine (2013). The significance of one style versus two styles: the return of Seddera section Socotroseddera to Convolvulus Phytotaxa 156(1): 47-53.
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.
  • Myint, T. & D.B. Ward (1968). A taxonomic revision of the genus Bonamia (Convolvulaceae) Phytologia 17: 121-239.
  • Verdcourt, B. (1957). Notes on East African Convolvulaceae (part I) Kew Bulletin 12: 334-347.

Not accepted by

  • Al Khulaidi, A.W.A. in Al Khulaidi, A.W.A. (2012). Fl. Yemen Convolvulaceae + Cuscutaceae Flora of Yemen: 73-76 + 80. EPA and UNDP, Republic of Yemen. [Cited as Seddera fastigiata.]
  • Sebsebe Demissew & R.R. Mill (2009). Revision of the genus Seddera (Convolvulaceae) Kew Bulletin 64: 197-233. [Cited as Seddera fastigiata.]
  • Miller, A.G. & M. Morris in Miller, A.G. & M. Morris (2004). Ethnofl. Soqotra Archipel. Convolvulaceae + Cuscutaceae Ethnoflora of the Soqotra Archipelago: 516-524. Royal Botanic Garden Edinburgh. [Cited as Seddera fastigiata.]
  • Walter, K.S. & Gillett, H.J. (1998). 1997 IUCN Red List of Threatened Plants: 1-865. IUCN. [Cited as Seddera fastigiata.]


Kew Backbone Distributions

  • Sebsebe Demissew & R.R. Mill (2009). Revision of the genus Seddera (Convolvulaceae) Kew Bulletin 64: 197-233.

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