CYTISUS 
346 
shoots above the graft exhibit hybrid characters (see Darwin, Varia- 
tion under Domest. ch. xi). 
Daboecia D. Don (or Dabeocid). Ericaceae (1. 3). 1 sp. D. polifolia 
D. Don (St Dabeoc’s heath), in Atl. Eur. (inch Ireland). 
Dacrydium Soland. Coniferae (Taxaceae, 3; see C. for genus cha- 
racters). 12 sp. Malaya, N. Z., Tasm. Most are dioecious. Fruit 
scales 1 or 2 or more. Seed arillate. 
Dactylis Linn. Gramineae (x). 1 sp. Eur. (inch Brit.), Medit., As., 
D. glomerata L., the cock’s-foot, a valuable pasture grass. 
Dahlia Cav. Compositae (v). 9 sp. Mexico. Perennial herbs with 
tuberous roots. Many varieties of D. variabilis Desf. and other sp. 
are in cultivation; the double forms have the disc florets ligulate as 
well as the ray (cf. Chrysanthemum). 
Dalbergia Linn. f. Leguminosae (111. 8). 80 sp. trop. Several are 
lianes. D . variabilis Vog. is a shrub with pendulous twigs when 
growing in the open, but in the forest becomes a liane climbing by aid 
of short lateral shoots which are sensitive to contact. Many sp. yield 
valuable wood, e.g. the Indian sp. D. latifolia Roxb. (blackwood or 
East Indian rosewood), and D. Sissoo Roxb. (Sissoo). 
Dalea Linn. Leguminosae (ill. 6). 100 sp. Am. 
Dalechampia Plum, ex Linn. Euphorbiaceae (A. 11. 2). 60 sp. trop. D. 
Roezliana Miill. - Arg. is often grown as a stove plant ; it has a very 
complex infl., whose construction is roughly indicated 
in the diagram. The whole is enclosed in two large „ ^ 
outer bracts (the big brackets), which are coloured * 
pink or white. Above these on the axis is a smaller cushion, 
bract (the little bracket), in whose axil is a 3-flowered * male firs. * 
cyme of ? firs. (F). Above this is the S part of the * 
infl., starting with 4 bracts (in the positions repre- F F F 
sented by the asterisks). Above these, anteriorly — r — ' 
are 9 — i4c?flrs. and posteriorly a curious yellow ^ r — ^ 
cushion, consisting of rudimentary <? flrs. In a sp. 
described by F. Muller the cushion secretes resin, which is used by 
bees for nest making, and attracts them to the flr. 
Dalibarda Linn. = Rubus Tourn. D. repens L. = R . Dalibarda L. 
Damasonium Mill. Alismaceae. 3 sp. Eur., Austr. 
Dammara (Rumph) Lam. =Agathis Salisb. 
Dampiera R. Br. Goodeniaceae. 34 sp. Austr. 
Danaea Sm. Marattiaceae (in). 11 sp. Am. The stem branches, a 
rare character in M. The synangia are very long, sometimes reaching 
from midrib to margin of the leaf. They open by a terminal pore. 
Danthonia DC. Gramineae (ix). 100 sp. trop. and temp., esp. S. Afr. 
Daphnales (Benth. -Hooker). The 5th series of Monochlamydeae. 
Daphne Tourn. ex Linn. Thymelaeaceae. 40 sp. Eur., temp, and sub - 
trop. As.; D. Mezereutn L., the Mezereon and D. Laureola L., the 
spurge-laurel, in Brit. Honey is secreted by the base of the ovary, 
