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Grewia L. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Species Plantarum 2: 964. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
General/Distribution: A genus with about 150 species; distributed in tropical and subtropical Africa, Asia and Australia.

 

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Small trees or shrubs, rarely subspreading or climbing, with stellate hairs. Leaves alternate, petiolate, entire or serrate, rarely lobed, 3-7-costate, somewhat coriaceous; stipulate. Inflorescence axillary or leaf-opposed, solitary or clustered, pedunculate, umbellate cymes or panicles. Flowers bisexual, pedicellate, yellow, orange, pink or white, pentamerous, bracteate. Sepals 5, free, leathery, mostly coloured and almost glabrous within, valvate. Petals 5, very rarely absent, free, mostly shorter than the sepals, clawed, claw thick, pitted or glandular near the point of insertion at the base of often glandular-hairy torus. Stamens numerous, free, inserted on the more or less elevated torus or androphore; anthers somewhat orbicular. Carpels 2-4, syncarpous; ovary superior on top of androphore, 2-4-loculed, each locule with 2 or more superposed ovules; style subulate, with 2-4-lobed stigma. Drupe yellow, red or violet, globose, entire or up to 4-lobed, containing 1-4 pyrenes, each stone 1 or 2-seeded, rarely more seeded and often transversely septate (locellate) between the seeds. Seeds suberect or horizontal, with copious to hardly any endosperm; embryo straight, with thin foliaceous cotyledons.
 

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1 Cymes axillary or leaf-opposed or flowers solitary; peduncles solitary or several together in clusters (2)
+ Cymes arranged in terminal or axillary, 8-15 cm long panicles. (Sepals cucullate at the apex) Grewia microcos
2 (1) Petals (8-) 10-14 mm long. Flowers solitary or in leaf-opposed cymes (3)
+ Petals 2.5-7 mm long. Flowers in axillary cymes (4)
3 (2) Suberect to erect shrub. Flowers white (rarely yellowish white), solitary (rarely paired) on 1-2 cm long peduncles. Petals bilobed at the apex Grewia tenax
+ Tree. Flowers yellowish-red, 2-8 together on 2-3.5 cm long peduncles. Petals entire at the apex Grewia optiva
4 (2) Leaves 3-costate (5)
+ Leaves 5-7-costate (7)
5 (4) Sepals 12-15 mm long. Petals 4-7 mm long (6)
+ Sepals 5-6 mm long. Petals 2.5-3 mm long Grewia helicterifolia
6 (5) Leaves almost glabrous, lanceolate, 10-13 cm long, 3.5-5 cm brad, acuminate; stipules 4-5 mm long. Petals oblong-elliptic, 4-5 mm long Grewia glabra
+ Leaves scattered stellate hairy above, hoary tomentose and whitish beneath, narrowly lanceolate to ovate, 1.2-5 cm long, 0.8-2.2 cm broad, obtuse. Stipues 8-10 (-15) mm long. Petals oblong-obovate, 6-7 mm long Grewia damine
7 (4) Leaf serratures without bunches of hairs; stipules linear-lanceolate or falcate. Petals oblong, entire or irregularly serrate at the apex. Drupe not as above (8)
+ Leaf serratures with bunches of long hairs; stipules ovate-oblong. petals narrowly obovate, emarginate to retuse at the apex. Drupe yellowhish-brown or coppery red, densely villous with bunches of hairs on tubercles Grewia villosa
8 (7) Large shrubs or medium sized trees. Leaves obtuse or cordate at the base. Drupe entire or obscurely 2-lobed (9)
+ A small shrub, 1-1.5 m tall. Leaves cuneate. Drupe somewhat 4-lobed Grewia sapida
9 (8) Leaves ovate-elliptic, unlobed or slightly 3-lobed towards acuminate apex; stipules linear. Sepals 6-8 mm long Grewia elastica
+ Leaves broadly ovate to almost orbicular, never lobed, acute to obtuse at apex; stipules obliquely lanceolate or falcate. Sepals c. 1.2 cm long Grewia asiatica
 
 
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