352 ZYGOPHYLLEEX (Sond.) [ Tribulus. 
often winged, tubercled, spiny or hispid, loculicidal. Seeds with or 
without albumen, the embryo straight and green. JRadicle superior. 
Herbs, under-shrubs, shrubs or trees, often with oppositely branched, nodose or 
distinctly jointed, rigid stems. Leaves opposite, compound, or rarely simple, _ab- 
ruptly or impari-pinnate, often bifoliolate, the common petiole produced at the top 
into a short point. Leaflets sessile, opposite, impunctate, generally unequal-sided, 
flat or fleshy, and sometimes terete ;*the margin often cartilaginous. Stipules twin, 
at the base of the petioles, persistent, often spinous, rarely deciduous. Peduncles 
one-flowered, axillary, or terminal, e ate. 
Natives of dry, desert-places and. sea-shores in the hotter parts of the temperate 
zones both north and south. Tribulus terrestris is a common sub-tropical weed of 
cultivation. The only valuable plants of this Order belong to Guaiacum, a shrubby 
or arborescent genus exclusively American, and which furnishes the Lignum-vite- 
wood and the Gum-Guaiacum of commerce. The Zygophylla generally indicate salt- 
ness in the soil: many of them are detestably scented. : 
TABLE OF THE SOUTH AFRICAN GENERA. 
Tribe I. Trisuteax. Seeds without albumen. 
;_f) I. Tribulus.—Petals 5. Fruit thorny, indehiscent. Leaves pinnate. 
<1) TI, Sisyndite.— Petals 5. Fruit capsular, s-angled, clothed with golden hairs, 
: dehiscent. Leaves simple. ‘ 
°~! TIL Augea,—Petals none. Fruit capsular, 10-angled, glabrous, Leaves simple. 
Tribe Il. Zycoraytinz. Seeds albuminous. 
ls IV. Zygophyllum.— Petals 4-5. Stdmens 8-10, Style 1. Leaves simple or bi- 
foliolate. 
O-! V. Seetzenia.—Petals none. Stamens 5. Styles. Leaves trifoliolate. 
I. TRIBULUS, Tourn. 
Calyx 5-parted, deciduous. Petals 5, spreading, longer than the ca- 
lyx. Stamens 10, hypogynous; filaments subulate, the 5 opposite the 
calyx-lobes with a gland, externally at base; anthers cordate, introrse. 
Ovary sessile, on a short 10-lobed urceolus, hairy, 5-celled ; ovules 3-4 
in each cell. Style short or none ; stigma large, 5-angled-pyramidal. 
Fruit depressed, 5-angled, of five indehiscent, dorsally tuberculated, 
spinous or winged, spuriously plurilocular carpels ; each locellus one- 
seeded. Seed exalbuminous. Lndl. Gen. 6030. = 
Weeds and weed-like, diffuse, procumbent, or prostrate herbs, dispersed thro 
the warmer temperate and tropical zones. tates ends one usually much larger 
than the other, bistipulate, abruptly pinnate ; leaflets opposite, quite entire, in Se 
__veral pairs. Peduncles axillary, one-flowered ; petals pale yellow or white. Name 
- Seen sree ree, and Bodos, a pomt ; each carpel is often armed with 3-4 larger spines. 
4. | * Carpels not winged. (Sp. 1-2). 
1. T. terrestris (Linn. Sp. p. 554); leaflets in 5-8 pairs, sub-equal, 
‘Tather acute; peduncle, from the wat of the ae leaf ; petals rather — 
_ longer than the calyx; stigma sub-sessile, hemispheric ; carpels with — 
2-4 larger spines, and prickly on the back. Lam. Ill. t. 346. f-1 
Fi.  E.& Al 751. 7 albus, Poir. T.mu- 
