254 CXXIIIp. URTICACE2 (Rendle). [ Urera. 
persistent perianth ; pericarp thinly crustaceous. Seed-coat thin, 
conforming to the pericarp; albumen very scanty; cotyledons 
broad, flat.—Climbing shrubs or small trees, often with stinging hairs, 
which are sometimes borne on simple or compound protuberances. 
Leaves alternate, petioled, simple, entire, toothed or crenate, 3- 
nerved at or just above the base, penninerved above. Stipules 
connate, 2-nerved, more or less divided above, generally falling early. 
Inflorescences solitary in the axils of existing or fallen ‘leaves, 
generally with a short but sometimes a long peduncle ; bracts small. 
Species about 30, in tropical America and Africa, and in the Mascarene and 
Pacific Islands. 
Plant neither densely hairy nor with slender creeping 
stem. 
Leaves ovate or rotund-ovate, many-nerved (with 
3-5 pairs of lateral nerves above the basal [dron. 
nerves) Be Ost i ... 1. U. hypseloden- 
Leaves with 2-3 pairs of lateral nerves above the 
basal nerves (see also no. 12), rarely only one 
pair (sometimes in no. 5). 
Leaves elliptic to oblong-elliptic, on long slender 
stalks ; stem armed or unarmed. 
Leaf margin minutely serrate; female inflor- 
escence arising in the leaf-axils_... ... 2. U. oblongifolia. 
Leaf margin entire ; female inflorescence arising : 
in the axils of fallen leaves... ee 3. U. Thonnert. 
Leaves obovate to elliptic-obovate, short-stalked ; 
stem armed. 
Leaves with 3 pairs of‘lateral nerves above the 
base ; perianth not completely enveloping 
the ovary ae nbc sa 
Leaves with 1 or 2 pairs of lateral nerves above 
the base ; perianth completely enveloping 
the ovary See Bie eos see 
Leaves elliptic to ovate-elliptic. 
Base emarginate to shallowly cordate, margin 
entire or obscurely crenate. 
4, U. obovata. 
5. U. Ellioti. 
Stem unarmed ... ws vis ied ... %. U, Batesit. 
Stem profusely armed... ... ne 7. UL Talbotii. 
Base cordate, margin crenate-dentate... ... § U. Manni. 
Leaves ovate-cordate, margin undulate; stem gigs 
armed See : 9. U. cordifolia. 
Leaves cuneate, with 3-4 pairs of nerves above the 
basal ae she oo ar aus ... 10. U. cuneata, 
Leaves elliptic, with 1 pair of nerves (sometimes 2 in 
no. 12) above the base. 
Leaves 3-6 in. long. 
A climbing shrub ; branches unarmed... wee LL. U. cameroonensts: 
A tree ; branches armed... a aa ... 12. U. arborea. 
Leaves 2} in. long orless ... ... se eee 18:. VU, usambarerer: 
Plant very hairy ; lower face of leaves tomentose... 14. U. sansibaricd. 
Plant with slender creeping stem and cordate leaves... 15. U. repens. 
