754 ZYGOPHYLLACEAE 
Achenes 1-3, rough—Two species, the fol- 
lowing and one in the W U. S. 
1. F. proserpinacoides Willd. Stems de- 
cumbent, 1—4 dm. long: leaves 2-8 cm. long, 
distant: 
various provinees, on Coastal vie only N, 
enn and —BSpr.—In 
Del. to Te 
favorable localities the EN Tur ten grow in 
dense carpets, especially on ene clay banks. 
Famity 7. ZYGOPHYLLACEAE—Catrrop FAMILY 
Shrubs, trees, or perennial herbs. Leaves opposite or — by the 
suppression of one of each pair: blades compound. wers perfect. 
Calyx of 4-6, mostly 5, sepals. Corolla of 4-6, mostly 5, nee or rarely 
wanting. Androecium of twice as many stamens as there are sepals. 
Gynoecium of 2-4-united carpels. Fruit capsular, sometimes baccate at 
maturity, or again separating into nut-like carpels—About 20 genera 
and 160 species, widely distributed in warm and temperate regions. 
Herbs: ovary sessile: stigmas lateral: corolla yellow or red. Tribe I. TRIBULEAE. 
E or trees: ovary stipitate: stigmas terminal, corolla 
blue Tribe II. GUAIACEAE. 
IBULEAE 
Fruit armed: ovary 5-celled ; carpels septate, 3-seeded. 1. TRIBULUS. 
Fruit unarmed : ovar y 10—12- celled ; carpels 1-seeded. 2. KALLSTBROEMIA. 
II. GUAIACEAE 
Leaves with few leaflets: flowers blue. 9. GUAIACUM. 
1. TRIBULUS L. Diffuse herbs. Leaves pubescent. Sepals 5, decidu- 
ous. Petals white or yellow. Filaments unappendaged. edid "m —About 
12 species, natives of warm and temperate regions.—BUR-N CALTROPS. 
Corolla less than 2 em. wide: peduncles shorter than the leaves: plant an 
1. T. terrestris. 
Corolla over 3 cm. wide: peduncles : plant perennial. 2. T. cistoides. . 
ris L. Branches 2-11 dm. long; leaves 2—6 cm. long; leaflets 10— 
rres 
14, the fide es Ti 12 mm. long: sepals 3-5 mm. long, acute: petals about 1 cm. 
long, y ellow: stamens pe as long as the 
pet mature carpel 6-7 mm. long.— 
(PUNCTURE-WEED.) — Waste-places, Coast 
Plain, Fla. to Tex. and N. Y., easional 
the interior. Nat. of Old World.— 
(Mex.)—Spr.—fall. 
2. T. cistoides L.. pe pee! pro- 
cumbent, pu xdg eav -6 em. long; 
leaflets 12- 16, the be elliptic: sepals 
oe 8- 11 mm mm. long, acuminate: petals 
r 
8—9 mm. long.—Hammoeks and waste- y 
Coastal Plain, T ter to Tex. and b. 
—(W. I., Mex., C. A., >: cae fall, or all year S. 
