ZYGOPHYLLACEAE 267 



Cultivated, not uncommon, fl. most of the year; widely distributed in 

 the Philippines. Throughout the tropics, a native of tropical America. 



The closely allied family Geraniaceae is represented in the Philippines 

 only by introduced and cultivated forms, a few species of Pelargonium 

 ("geranium" of gardeners) which do not, as rule, thrive in Manila. A 

 single species, Pelargonium graveolens Ait., a native of South Africa, the 

 "rose geranium" of America and "malva rosa" of Spaniards, is extensively 

 cultivated here as a pot-plant, but it very rarely or never flowers in Manila. 



67. ERYTHROXYLACEAE (Coca Family) 



Glabrous slender shrubs or trees with alternate, entire leaves, involute 

 in bud, the stipules solitary, intrapetiolar. Flowers axillary, solitary or 

 fascicled, 5-merous, perfect. Calyx persistent, 5-lobed. Petals 5, free, 

 clawed, ligulate at the base inside. Stamens 10, the filaments connate 

 into a shallow cup. Ovary superior, 3-celled, 2 cells usually sterile, the 

 third with 1 or 2 ovules; styles 3, free or connate. Fruit dii. paceous, the 

 pulp scanty. 



Genera 2, species about 195, of wide tropical distri'n.tioii, but mostly in 

 tropical America. 



1. ERYTHROXYLUM P. Browne 



Characters of the Family as ;Tiven above. (Fi u <-t-- '~' —k "red" and 

 "wood.") 



Species 194, 3 in the Philippines, the following introduct 



*1. E. COCA Lam. Cocaine Plant. 



An erect, branched, glabrous shrub 1 to 2 m high, jjeaves thin, elliptic- 

 oblong or narrowly obovate-elliptic, 2 to 7 cm long, obtuse, mucronulate, 

 base acute, longitudinal nerves or lines 2 or 4, slender, more distinct in 

 young leaves. Flowers white, axillary, several in each axil, their pedicels 3 

 to 4 long. Petals about 4.5 mm long, the blade elliptic. Fruit oblong, red, 

 the pulp thin, 7 to 10 mm long, cylindric, when dry 3-angled. 



Cultivated, Singalon, Cementerio del Norte, etc., fl. most of the year. 

 A native of South America, now cultivated in many tropical countries 

 and of very recent introduction in the Philippine'' 



68. ZYGOPHYLLACEAE (Tribulus Family) 



Herbs with opposite, stipulate, abruptly pinnate leaves. Peduncles axil- 

 lary, solitary, 1-flowered. i Flowers perfect, regular, rather showy, yellow. 

 Sepals 5, imbricate, deciduous. Petals 5, spreading, imbricate. Disk an- 

 nular, 10-lobed. Stamens 10, inserted on the base of the disk, the 5 

 longer ones opposite the petals, the 5 shorter ones with a gland at the 

 base. Ovary sessile, lobed, us >, ,ly of 4 or 5 i;,"-pels. Fruit of several, 

 spinous, indehiscent cocci. Si.eJf .'-liquely pen' ius. • 



Genera about 20, species more tlian 100, ihii ;• tropical and Subtrop- 

 ical, one genus and species known from the Philiijpines. 



1. TRIBULUS Linnaeus 



Characters of the. Family as gi-, a ;''"^''p (Grerk "caltrop," literally 

 3 -pointed.) 



About 15 species, in most warr- "intrie'^, ] im^^-'^ducp'' in the Philip- 

 pines. 



