DEGUELIA 
347 
and the depth of the tube preserves it for long-tongued insects. 
Several sp. are cultivated. 
Daphniphyllum Blume. Euphorbiaceae (A. I. 3). 12 sp. trop. Afr., 
Indo-mal. , China, &c. 
Daphnopsis Mart, et Zucc. Thymelaeaceae. 25 sp. S. Am., Mexico, 
W. Ind. 
Darlingtonia Torr. Sarraceniaceae. 1 sp. Calif. , a pitcher plant like 
Sarracenia, but with the top of the tube bent over and with a fish-tail- 
shaped flap in front of the opening. 
Darwinia Rudge. Myrtaceae (3). 25 sp. Austr. Heath-like shrubs. 
Dasylirion Zucc. Liliaceae (vi). 10 sp. Texas, Mexico. Xerophytes 
of Aloe-like habit with woody, often tuberous, stems, and hard 
leaves. Firs, dioecious, in gigantic infl. 
Datisca Linn. Datiscaceae. 2 sp. N. Am., W. As. 
Datiscaceae. Dicotyledons (Archichl. Parietales). 3 gen. with 4 sp., 
trop. and temp. Trees or herbs with exstip. leaves and racemes or 
spikes of regular, usually dioecious, sometimes apetalous flrs. In the 
c?flr. : K 4 — 9, free or united; C 4 — 9 or o; A 4 — 9 or oc._ In the 
¥ : K 3 — 8, united to one another and to the ovary; Co; G (3 — 8), 
with free styles. Ovary i-loc. with parietal placentae and 00 anatro- 
pous ovules. Capsule. No endosperm. Genera : Datisca, Tetra- 
meles, Octomeles. The affinities of D. are doubtful (see Nat. PJl .) ; 
they are probably most nearly allied to Begoniaceae. Benth. -Hooker 
place them in Passiflorales, Warming in Passiflorinae. 
Datura Linn. Solanaceae (ill. 6). 15 sp. trop. and warm temp. D. 
Stramonium L., the thorn-apple, is sometimes found as an escape in 
Brit. It has a 4-loc. ovary (see order) giving a 4-valved capsule 
covered with spines. The leaves and seeds are used in medicine. 
Daucus (Tourn.) Linn. Umbelliferae (8). 50 sp. Eur., As., Afr., Am. 
D. Carota L. the carrot, in Brit. The cultivated form has much 
more fleshy roots than the wild. In the centre of the umbel is usually 
a red terminal flr. After fertilisation the peduncles all bend inwards 
until the fruits are ripe and then spread out again to allow the burred 
mericarps to adhere to animals. 
Davallia Sm. Polypodiaceae. 80 sp. mostly trop. Sori marginal. 
Davlesia Sm. Leguminosae (ill. 2). 55 sp. Austr. 
Davilla Vand. Dilleniaceae. 25 sp. trop. Am. The two inner sepals 
are larger than the rest and grow straight upwards. After fertilisa- 
tion they grow woody or leathery and enclose the fruit. 
Debregeasia Gaud. Urticaceae (3). 5 sp. Abyss., S. and E. As. D. 
edulis Wedd. is the Janatsi of Japan, yielding edible fruit and useful 
fibre (cf. Boehmeria). 
Decaisnea Hook. f. et Thoms. Lardizabalaceae. r sp. Himal., D. 
insignis H. f. et T., with edible fruit (see Hooker’s Himal. Journal , 
chap. xxv.). 
Deguelia Aubl. = Derris Lour. 
