- Family: Convolvulaceae Juss.
- Genus: Convolvulus L.
Convolvulus socotranus Verdc.
- Genus: Convolvulus L.
[KBu]
Demissew, S. & Mill, R.R. (2009). Revision of the genus Seddera (Convolvulaceae). Kew Bulletin 64: 197. https://doi.org/10.1007/s12225-009-9112-8
- Type
- 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.
- Distribution
- Endemic to Yemen; known only from the island of Soqotra.
- Ecology
- Sandy ground; sea level – 30 m.
- Conservation
- Vulnerable. Rare with a very limited area of occupancy.
- Phenology
- Flowering time: February to April; August and September.
- Note
- 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.
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[KBu]
- Use
- 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:
Socotra
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.]
Literature
Kew Backbone Distributions
- Sebsebe Demissew & R.R. Mill (2009). Revision of the genus Seddera (Convolvulaceae) Kew Bulletin 64: 197-233.
Herbarium Catalogue Specimens
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Kew Names and Taxonomic Backbone
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© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0