112 NORTH AMERICAN FLORA [Volume 25 



3. Kallstroemia glabrata Rydberg, sp. nov. 



Annual ; stem branched at the base, decumbent, 2-3 dm. long, finely pilose; stipules 

 subulate, 2-3 mm. long; leaves 1-3 cm. long; petioles 3-5 mm. long; leaflets 2-3 pairs, 

 obliquely oval or suborbicular, 3-12 mm. long, slightly ciliate on the margins, otherwise 

 glabrous or nearly so at least in age, thin ; peduncles 5-15 mm. long, in fruit somewhat 

 curved ; sepals subulate, 2-3 mm. long, hirsute ; petals obovate, about 3 mm. long, appar- 

 ently white ; fruit strigose ; beak 2 mm. long, columnar, not thickened at the base; car- 

 pels 3 mm. long, cross-ridged on the back and with obtuse tubercles. 



Tvpe collected at Acapulco and vicinity, October, 1894, to March, 1895, Palmer 131 (U. S. 

 Nat. Herb.). 



Distribution : Known only from the type locality. 



4. Kallstroemia brachystylis Vail, Bull. Torrey 

 Club 24 : 206. 1897. 



Tribulus brachystylis B. L. Robinson ; A. Gray, Syn. Fl. N. Am. 1 : 354. 1897. 



A profusely branched annual ; stems prostrate, 2-3 dm. long or more, very brittle, 

 swollen at the nodes, sparingly pubescent, with short appressed slightly twisted hairs and 

 fewer longer and spreading cilia; stipules obliquely lanceolate to ovate-lanceolate, 4-5 mm. 

 long, ciliate, at length caducous; petioles shorter than the leaflets; leaves 2-5 cm. long; 

 leaflets 3-4 pairs, obliquely elliptic or oval, 6-15 mm. long, slightly falcate, ciliate on the 

 margin above with somewhat stiff white hairs, paler, hirsute when young, at length 

 glabrous beneath; flowering peduncle 6 mm. long (or longer), in fruit 1.5-2 cm. long, ap- 

 pressed-pubescent ; sepals lanceolate, often caducous before the maturity of the carpels ; 

 petals 4-5 mm. long, orange to pale-yellow, sometimes shorter than the sepals ; fruit 

 minutely pubescent ; beak persistent, glabrous, 1-2 mm. long, obtuse, shorter than the 

 body; nutlets 8-10, about 3 mm. long, with rounded tubercles on the back, strongly 

 reticulate on the faces. 



Type locality : Mesa near Las Cruces, New Mexico. 



Distribution : From New Mexico to southern Colorado, Arizona, Lower California, and 

 Tamaulipas ; apparently also in Puebla and Oaxaca. 



5. Kallstroemia californica (S. Wats.) Vail, Bull. Torrey 

 Club 22 : 230. 1895. 



Tribulus californicas S. Wats. Proc. Am. Acad. 11 : 125. 1876. 



A low diffuse annual ; stems decumbent, 1-4 dm. long, branching, hoary-pubescent or 

 often somewhat hirsute, becoming glabrate, rarely glaucescent ; stipules minute, subulate 

 or lanceolate, persisting or caducous ; petioles about the length of the leaflets ; leaves 1.5- 

 5 cm. long ; leaflets 5-7 pairs, elliptic, 5-10 cm. long, obtuse or acutish, hoary-pubescent ; 

 peduncles shorter than the leaves ; sepals caducous in fruit, 3-4 mm. long ; petals yellow, 

 about as long as or a little longer than the sepals ; fruit minutely canescent-strigose ; beak 

 obtuse, glabrous, slender, shorter than the carpels ; carpels 8-10, lanceolate, with sharp 

 tubercles on the back and nearly smooth faces. 



Type locality : Lower California, on the eastern side of the peninsula. 

 Distribution : Arizona, southern California, Lower California, Sonora, and Sinaloa. 



6. Kallstroemia hirsutissima Vail, in Small, Fl. 

 SE. U. S. 670. 1903. 



A much branched annual ; primary branches rather stout, trailing, 4-7 dm. long, ap- 

 pressed cinereous-pubescent and hirsute with longer spreading hairs ; leaves short-petioled, 

 2-3.5 cm. long ; stipules lanceolate, 3-6 mm. long, persistent ; leaflets $-\ pairs, elliptic, 

 8-20 cm. long, shaggy-hirsute, at least beneath ; peduncles 1-1.5 cm. long, shorter than the 

 leaves; sepals linear-lanceolate, 4-6 mm. long; corolla yellow (or orange-j'ellow), fading 

 whitish ; petals obovate-oblong, 5-6 mm. long, retuse ; fruit canescent-strigose ; beak per- 

 sistent, pubescent, conic at the base, 3-4 mm. long, as long as or shorter' than the body ; 

 carpels 10, about 4 mm. long. 



Type locality : Dona Anna County, New Mexico. 



Distribution : Kansas and Colorado to Texas and northern Mexico. 



