6i6 
U MB ELLI FERAE 
C. DIPLOZYGIEAE (umbels compound; fruit with primary 
and secondary ridges, the latter often the more strongly de- 
veloped ; vittae in the furrows or under the secondary ridges). 
8. Caucalineae (ribs not winged or with deeply lobed wings or 
spines) : Coriandrum, Cuminum, Daucus, Caucalis. 
9. Laserpitieae (secondary ridges very marked and often extended 
into broad undivided or wavy wings) : Laserpitium. 
“Surface of junction” in the above characters refers to the surface 
by which the mericarps are united to one another. 
[Placed in Umbellales by Benth.- Hooker, in Umbelliflorae oy 
Warming.] 
Umbelliflorae. The 26th cohort (Engler) of Archichlamydeae (p. 131). 
The 23rd cohort (Warming) of Choripetalae (p. 138). 
Umbilicus DC. = Cotyledon Tourn. 
Uncaria Schreb. ( Ourouparia Aubl.). Rubiaceae (l. 6). 30 sp. trop. 
They climb by hooks, which are metamorphosed infl.-axes, and are 
sensitive to continued contact ; after clasping they enlarge and become 
woody (p. 172). 
Uncinia Pers. Cyperaceae (11). 30 sp. Austr., S. Am. The axis of 
origin of the fir. projects beyond the utricle in the form of a long 
hook, serving as a means of dispersal for the fruit. 
Uniola Linn. Gramineae (x). 5 sp. Am. Useful as pasture. 
Unlsexuales (Benth.-Hooker). The 7th series of Incompletae (p. 137). 
Unona Linn. f. Anonaceae (3). 40 sp. trop., As., Afr., Austr. Trees 
or shrubs, the latter climbing by recurved hooks which are infl.-axes 
(see p. 172). The fruit is an aggregate of stalked berries, which are 
constricted between the seeds like a lomentum. 
Uragoga Linn. (incl. Cephaelis Sw. The boundaries of U ., Psychotria 
and allied genera are badly-defined. The grouping given by Schumann 
in Nat. PJl . is followed in this book.) Rubiaceae (II. 15). 150 sp. 
trop. U. ( C .) Ipecacuanha Baill. {P. Ipecacuanha Stokes) is the 
Ipecacuanha plant of Brazil ; it is a herb with decumbent stem, and 
roots thickened somewhat like rows of beads. The root is used in 
medicine. 
Urena Dill, ex Linn. Malvaceae (iit). 3 sp. trop. Fruit a schizocarp, 
the individual cpls. provided with hooks. 
Urera Gaudich. Urticaceae (1). 18 sp. trop. The stinging hairs are 
very powerful. The achene is enclosed in the persistent fleshy 
perianth, forming a pseudo- berry. 
Urginea Steinh. Liliaceae (v). 24 sp. Eur., As., Medit., Afr. U. 
Scilla Steinh. (U. maritima Baker) is the squill, with very large 
bulbs. It is used in medicine. 
Uropappus Nutt. = Microseris D. Don. 
Urospermum Scop. Compositae (xm). 2 sp. Medit. 
Urostigma Gasp. = Ficus Tourn. 
Ursinia Gaertn. Compositae (x). 54 sp. S. Afr., 1 sp. Abyssinia. 
