DRUPACEAE 
358 
Drupaceae (Warming) = Rosaceae (sub-order v). 
Dryandra R. Br. Proteaceae (11). 50 sp. Austr. Like Banksia. 
Dryas Linn. Rosaceae (ill. 6). 2 sp. arctic. D . octopetala L. alpine 
in Brit. It is androdioecious in the Alps, but probably the <f plants 
are due to poor nourishment (p. 68). The style becomes feathery 
after fertilisation (cf. Clematis, Geum). 
Drymaria Willd. Caryophyllaceae (11. 3). 30 sp. trop. and S. temp. 
Drymoglossum Presl. Polypodiaceae. 3 sp. Himal. to Borneo. D, 
carnosum Hk. has succulent leaves. 
Drymonia Mart. Gesneriaceae (1). 15 sp. trop. Am., W. Ind. 
Dryobalanops Gaertn. f. Dipterocarpaceae. 4 sp. Borneo, Sumatra. 
D. aromatica Gaertn. and other sp. yield Borneo or Sumatra cam- 
phor; it is found in the cracks of the wood and is obtained by cutting 
up the trunk into pieces. It is rarely seen in Europe, being used 
chiefly in China, where it commands a high price. The young leaves 
are red, and hang downwards (p. 157). 
Duguetia A. St. Hil. Anonaceae (3). 20 sp. trop. S. Am. D . quita- 
rensis Benth. and other sp. furnish, it is said, some of the lancewood 
of commerce. The fruit is formed of the individual berries or achenes 
united to the fleshy receptacle. 
Duranta Linn. Verbenaceae (11). 8 sp. S. Am. 
Durio Adans. Bombacaceae. 7 sp. Indo-mal. D. zibethinus Murr. 
produces the durian fruit, well known for its delicate flavour and 
disagreeable smell. 
Duroia Linn. f. Rubiaceae (1. 8). 10 sp. S. Am. The chief interest 
is the myrmecophilous habit (p.115). D. petiolaris Hk. f. and D. 
hirsuta K. Sch. have stems swollen just below the infl. The swollen 
part is hollow and entrance is obtained by two longitudinal slits. This 
curious organ seems to arise spontaneously and is inhabited by ants, 
which bite through the thin parenchymatous tissue of the slits. D.sacci - 
fera Benth. et Hk. f., on the other hand, has its ‘ant-houses’ on the 
leaves. At the base, upon the under side of each leaf, are two pear- 
shaped organs formed by outgrowth of the leaf. The entrance is upon 
the upper side of the leaf, and protected from the rain by a little flap. 
Duvaua Kunth = Schinus Linn. 
Dyclda Schult. f. Bromeliaceae (3). 6 sp. Brazil. 
Dypsis Noronha. Palmae (iv. 6). 6 sp. Madag. (p. 158). 
Dysodia Cav. Compositae (vi). 34 sp. Am. 
Dysoxylum Blume. Meliaceae. 100 sp. Indo-mal. 
Ebenaceae. Dicotyledons (Sympet. Ebenales). 5 gen. with 280 sp. 
trop. (especially Indo-mal.). Trees and shrubs with alt., opp. or 
whorled, simple, leathery, usually entire leaves. Firs, axillary, soli- 
tary or in small cymes, regular, usually dioecious, bracteolate, 3 — 7- 
merous. K persistent, gamosepalous; C convolute, gamopetalous. 
Sta. epipetalous at base of tube, usually in 2 whorls but frequently 00 
by branching; staminodes usually present in ? flrs., ovary syncarpous, 
