514 NATURAL I1TST0RY OF PLANTS. 



late; flowers minute subaxillary, solitary; fructiferous peduncle 

 pendulous {Warm Africa, South- West. Asia x ). 



1 1 G. Peganum L. — Flowers 4-5-merous ; sepals usually foliaceous 

 narrow entire or pinnatirid ; prsefloration subvalvate, slightly imbri- 

 cated or open. Petals entire subequal, imbricated or contorted, 

 finally patent. Stamens 3 times more than petals inserted round 

 usually smooth disk ; filaments dilated at base, sometimes antherless ; 

 anthers linear, introrsely 2-rimose. Grermens sometimes shortly 

 stipitate ; cells 2, 3 ; ovules co , inserted at internal angle, oblique 

 anatropous ; style erect, sometimes more or less bent, 2, 3-angular- 

 carinate; keels papillose stigmatiferous. Fruit subglobose fur- 

 nished with base of persistent calyx, usually dry, 2, 3-valved 

 {Eupcfjanum), sometimes baccate, indehiscent (Malacocarpus) ; endo- 

 carp papyraceous, adherent. Seeds co ; testa outwardly spongy 

 scrobiculate ; albumen fleshy ; embryo curved. — Eamified inodorous 

 herbs, not glandular-punctuate, glabrous or pubescent ; stems terete ; 

 leaves alternate, entire, irregularly pinnatifid ; stipules lateral se- 

 taceous, unequal ; flowers pedunculate, solitary, leaf-opposed {Med. 

 Beg. West. Cent, and Trop. Asia, Mexico). See p. 427. 



117. Tribulus T. — Flowers hermaphrodite; receptacle convex. 

 Sepals 5, imbricated, deciduous or persistent. Petals same in 

 number, imbricated or contorted, deciduous. Stamens 10, 2-seriate, 

 of which the 5 alternipetalous longer, outwardly enlarged with gland 

 at base ; filaments free, naked, inserted below 10-lobed disk ; anthers 

 introrse, 2-rimose. Germen superior sessile adpressed, hirtus ; 

 cells 5, oppositipetalous, or more rarely 6-12, sometimes cc-locellate 

 with oblong or transverse septa ; style filiform or pyramidal, stigma- 

 tiferous 5-12-lobed at apex; ovules in each cell 1-co , finally super- 

 posed, usually oblique descending ; micropyle extrorse superior. 

 Fruit of 5-12-cocci; cocci finally solute from sometimes thick 

 pyramidal columella, corneous or osseous, clorsally winged, spinose 

 aculeate or tuberculate, usually indehiscent ; seeds descending, 



1 Spec. 1 . &. prostrata. — S. africana R. 2S1, t. 7. — Zygophyllum prostration Thunb., Fl. 



Be., loc. cit. — Harv. & Sond., Fl. Cap., i. Cap., 543 (ex Soxd.). — ? Z. lanatum W., Spec, 



36G.— Olit., FL. Trop. Afr., i. 288.— Boiss., ii. 561 (doubtfully from It. Be., from woolly 



Fl. Or., i. 916. — Walp., R<p., i. 498. — £. articulation and long filiform style, as described 



orientalis Dcne., in Ann. Sc. Nat., ser. 2, iii. by authors). — DC, Frodr., i. 706, n. 19. 



