36 
ZYGOPHYLLACE.<E. 
1. TRIBULUS, Linn. 
Sepals 5, free, deciduous. Petals 5, fugacious, obovate, imbricated. 
Stamens 10, free, the filaments filiform, those alternate with 
the petals with a basal gland. Ovary sessile, 5*celled ; ovules 1 or 
few in a cell ; style short ; stigmas as many as the cells. Pruit of 
dry hard separable cocci, with a horn at the corners and setose on the 
hack. — Branched herbs with abruptly pinnate leaves and small solitary 
fugacious flowers. Distrib. Species 15 ; cosmopolitan, mainly tropical. 
1. T. terrestris, Linn. ; DC. Prod. i. 703. Annual or perennial, 
much branched at the crown of the root, with trailing stems, clothed 
like the leaves and sepals with white adpressed hairs. Leaves short- 
petioled, in opposite pairs, one smaller than the other ; leaflets 5-7- 
jugate, oblong, sessile ; stipules linear, persistent. Plower J inch across. 
Pruit of 5 triquetrous cocci, with a large spiny horn at each corner, 
containing 2-3 transverse septa with a seed between each. T. lanugi- 
nosus, Linn. 
Mauritius and Seychelles, in sandy ground near the sea, not common. Cosmo- 
politan in and near the tropics. 
Order XX. GERANIACEiE. 
Tribe 1. Ox abided. 
Plowers regular, hermaphrodite. Sepals 5, persistent, imbricated. 
Petals 5, obovate, hypogynous, spirally twisted in the bud. Stamens 
10 ; filaments usually joined at the base, biserial, those opposite the 
petals longer ; anthers 2-celled, dehiscing longitudinally. Ovary 5- 
celled ; placentation axile ; ovules few or many, anatropal. Pruit a 
membranous capsule, rarely a drupe. Seeds albuminous. — Herbs, 
shrubs or rarely trees, with compound acid often sensitive leaves and 
fugacious often showy axillary or radical solitary, corymbose or umbel- 
late flowers. Distrib. Species 200-250. Mostly Cape and trop. 
American. 
1. OXALIS, Linn* 
Sepals 5, lanceolate, free. Petals 5, obtuse, contorted. Stamens and 
pistil often trimorpbic, as in Lythrum. Stamens 10, in two rows, the 
inner longer ; filaments joined at the base ; anthers minute, oblong. 
Ovary 5-celled; ovules many in a cell; styles distinct, falcate, short. 
Pruit an oblong or cylindrical membranous capsule, with loculicidal 
dehiscence. — Herbs or shrubs; leaves digitate or pinnate; peduncles 
axillary or radical ; flowers sometimes dimorphic, some apetalous as 
in Viola. Distrib. Species 220 ; preponderant at the Cape and in 
South America. 
Acaulescent ; leaflets termite * 0. corymbosa. 
Caulescent ; leaflets temate 1.0. corniculata. 
Leaves abruptly pinnate ; leaflets 6-9 -jugate . .. .. .. . 2.. 0. sensitiva. 
