CATALOGUE. 79 



from a woody root, very slender and wiry, decumbent, somewhat hairy 

 (with the characteristic hairs of the order) ; leaves on short but distinct 

 petioles, slightly cordate at base, ovate-oblong, very slightly mucronate, 

 pale and veiny beneath, 9-18" long. Normal flowers with 10 large glands 

 on the base of the calyx-lobes ; petals clawed, glandular fimbriate above ; 

 stamens monodelphous at base only, perfect anthers 3, imperfect (on fila- 

 ments about the same length) 2 ; " fruit of a single carpel, of nearly the same 

 form as in A. Hartwegiana, but more even, with rounded and only slightly 

 margined sides" (Gray ) ; three or four together terminating filiform pedicels 

 on foliaceous or bracted peduncles, or on slender pedicels from the axils of 

 the leaves. Abnormal flowers on slender peduncles, which are terminated 

 by a pair of bracts 4" long and half as wide, from between which the 

 short pedicel and its flower arise. (627.) Sanoita Valley, Southern Arizona. 



ZYGOPHYLLACE.E.* 



TsiBULUst (Kallstrozmia) maximus, L. — Leaves longer than the pedi- 

 cels; leaflets, 3-4 pairs, oval, hairy on the lower surface; carpels 10, slightly 

 gibbous below, tuberculate; style 5" long; sepals lanceolate, tapering into 

 an acute apex, § as long as the petals. San Carlos, Ariz. (777.) 



Tribulus (KALLSTECEMrA) GEANDiFL0Kus,Benth.& Hook. (Kallstrosmia 

 grandiflora, Torr. in PI. Wright. 1, p. 26.) — Stem clothed with long, brown, 

 spreading hairs; leaves shorter than the older peduncles, leaflets 4-5 pairs, 

 oblong, slightly falcate ; sepals lanceolate-linear, with long, attenuated tips ; 

 petals nearly or quite as long as the sepals ; carpels less tuberculated on the 



* Zygophyllacb^;. — " Calyx 4- to 5-merons, generally imbricate. Petals hypogynous, usually im- 

 bricate. Stamens usually double the number of the petals, hypogynous ; filaments usually with a scale 

 inside. Ovary several-celled. Fruit a loculicidal capsule, Bepticidally dividing into cocci. Embryo 

 exalbuminons, or enclosed in cartilaginous albumen. — Scentless plants. Leaves opposite, pinnate, stipu- 

 late." — LeMaout & Decaisne (English edition). 



t Tribulus, Linn. — Sepals 5, deciduous, or persistent, imbricated. Petals 5, fugacious, spreading, 

 imbricated. Annular disk 10-lobed. Stamens 10, inserted on the base of the disk, 5 opposite to the petals 

 exterior and usually somewhat longer than the others, 5 alternate with a gland outside of the base, fila- 

 ments filiform and naked. Ovary sessile, with appressed hairs, 5-12-lobed. 5-12-celled, the cells oppo- 

 site the petals frequently 3-5-locellate by transverse partitions; style short, pyramidal or filiform; 

 stigmas 5-12; ovules 1-5 in each cell, superposed. Fruit 5-angled, indehiscent. Seeds obliquely pendu- 

 lous, one in each cell or cellule, testa membranous ; embryo exalbuminous, cotyledons oval, radiclo 

 short. — Loosely branching herbs, often silky-hairy, and with prostrate branches. Leaves stipulate oppo- 

 site, sometimes alternate by abortion of one, abruptly pinnate. Flowers solitary, pseudo-axillary, 

 pedunculate, white or yellow. — Bentham &. Hooker. 



