ANALYSIS OF THE GENERA. 59 
ORDER LXXVIII. URTICACE A.— Enpricu. 
Flowers small, green, monoecious or dicecious, solitary or clustered, 
or in catkins or close heads, surrounded by an involucre. Perianth 
membranous, inferior, lobed, persistent. Stamens definite, distinct, in- 
serted into the base of the perianth, and opposite its lobes. Anthers 
curved inwards in estivation, turning backwards with elasticity when 
bursting. Ovary simple, free, superior. Styles two or one. Stigma 
simple. /ruit a simple indehiscent nut, surrounded by the persis- 
tent membranous or fleshy perianth, or inserted into a fleshy recep- 
tacle, which is dilated, and often concave. Seed erect, or pendulous, 
with or without albumen. Zmbryo straight, curved, or spiral. 
Cotyledons flat. adicle always pointing to the hilum.—T’ees, 
shrubs, or herbs. Leaves alternate, usually covered with asperities or 
stinging hairs. 
GENERA. 
Herbaceous plants. 
Perianth of the fertile flowers four-partite Parretarta, vy. 1. p. 199. 
Perianth of the fertile flowers two 
walwed .<cpeasssjas- acti yoo coacasoN0 cer Urtica,.v. 3. p. 1192. 
Climbing shrub......... Sele cietee trina err ser ... Houmotts, v. 3. p. 1282. 
ORDER LXXXIX. ULMACEA.—Mirset. 
Perianth single. Flowers perfect, or polygamous, never in catkins. 
Perianth inferior, irregular, divided, campanulate. Stamens three to 
six, inserted into the base of the perianth, erect in estivation. Ovary 
superior, two celled. Stigmas two, distinct. Fruit one or two 
celled, indehiscent, membranous or drupaceous. Seeds solitary, pen- 
dulous. Albumen none, or in very small quantity. Embryo 
straight, or curved with foliaceous cotyledons. Radicle superior.— 
Trees and shrubs, with simple scabrous alternate deciduous leaves and 
stipules. 
GENERA. 
Capsules compressed, winged all round... Urns, v. 1. p. 431. 
ORDER LXXX. BETULINEA.—Ricsa. 
Flowers moncecious, amentaceous. Perianth free, campanulate, 
four or five lobed. Stamens distinct, four to twelve, free, inserted 
into the base of the perianth, and the same number as its lobes, or 
double or treble that number. <Anthers two celled. Ovary superior, 
two celled. Style single, or none. Stigmas two, Fruit membra- 
nous, indehiscent by abortion, one celled. Seed pendulous, naked. 
