Part 1, 1907] ( )XAUDACEAE 47 



and the branches, the petioles loosely pubescent ; blades of the leaflets cuneate, obovate or 

 oblong-obovate, mostly 1-2 cm. long, ciliate and more or less pubescent on both sides but 

 more copiously so beneath, those of the terminal leaflets emarginate or notched, those of 

 the lateral ones singly or doubly notched at the apex ; primary peduncles mostly longer 

 than the petioles; pedicels loosely pubescent, 4-10 mm. long; sepals 4-5 mm. long, the 

 outer ones oblong to lanceolate, ciliate, sparingly pubescent ; longer filaments appeudaged 

 below the middle, above which they are pubescent ; styles pubescent ; capsules broadly- 

 oblong or ovoid-oblong, 7-8 mm. long, pubescent on the angles ; seeds about 2 mm long. 



Type locality: Between Laredo and Ringgold Barracks, Texas. 

 Distribution : Southern Texas and adjacent Mexico. 



3. Lotoxalis psilotrichia (Turcz.) Rose, Contr. U. S. Nat. 



Herb. 10: 116. 1906. 



? < ) i alis Uphrodes Turcz. Bull. Soc. Nat. Mosc. 31* : 427. 1858. 

 i>i alii psilotrichia Turcz. Bull. Soc. Nat. Mosc. 3P : 427. 1858. 

 ? 1 1 1 alis fasciculaia Turcz. Bull. Soc. Nat. Mosc. 32i : 272. 1859. 

 1 Lotoxalis fasciculata Rose, Contr. U. S. Nat. Herb. 10: 115. 1906. 

 ? Lotoxalis tephrodes Rose, Contr. U. S. Nat. Herb. 10: 116. 1906. 



Plants 3-1S cm. tall, the stem and branches densely pubescent throughout with mostly 

 ascending hairs ; leaves scattered along the stem and the branches or more approximate 

 near the tips of the branches, the petioles densely pubescent like the branches ; blades of 

 the leaflets ovate to oblong-ovate, 0.3-1.5 cm. long, densely strigose with pale hairs on 

 both surfaces, or only on the lower surface, notched at the apex, those of the lateral leaf- 

 lets obliquely so, or that of the terminal one sometimes merely obtuse ; primary peduncles 

 mostly longer than the petioles ; pedicels 3-7 mm. long, closely and rather loosely 

 pubescent ; sepals mostly 4.5-5 mm. long, the outer ones lanceolate to linear-lanceolate, 

 closely pubescent, ciliate and bearded at the apex; petals yellow, 8-12 mm. long; longer 

 filaments appendaged below the middle, above which they are pubescent ; capsules broadly 

 oblong, 4-5 mm. long; seeds 1.5-2 mm. long. 



Type locality : Zimapan, Mexico. 

 Distribution : Southern Mexico and Guatemala. 



4. Lotoxalis Neaei (DC.) Rose, Contr. U. S. Nat. 

 Herb. 10: 115. 1906. 

 Oxalis Neaei DC. Prodr. 1 : 691. 1824. 



Plants 9-35 cm. tall, erect, or more or less diffuse, the stem and branches closely pubes- 

 cent with very fine erect or ascending hairs which are somewhat deciduous in age ; leaves 

 mostly crowded or approximate at intervals along the stem and the branches, the petioles 

 pubescent like the branches; blades of the leaflets ovate to lanceolate, mostly 1-3 cm. long, 

 finely pubescent on both sides, but more densely so beneath, that of the terminal leaflet 

 obtuse, acutish, or notched at the apex, those of the lateral ones usually much smaller and 

 decidedly notched at the apex ; primary peduncles mostly longer than the petioles ; pedicels 

 finely pubescent, 3-5 mm. long ; sepals 3-4 mm. long, the outer ones oblong-lanceolate, 

 pubescent ; longer filaments appendaged below the middle above which they are pubescent ; 

 styles glabrous ; capsules oblong to ovoid, 4-6 mm. long, nearly twice as long as the sepals; 

 seeds about 1.5 mm. long. 



Type locality: Acapulco, Mexico. 



Distribution : Mexico and Central America to Brazil. 



5. Lotoxalis frutescens (L.) Small. 



Oxalis frulescens h. Sp. PI. 435. 1753. 



Oxalis Plumieri Jacq. Oxalis Monogr. 23. 1794. 



Plants 12-95 cm. tall, the stem more or less branched, the young branches pubescent 

 with short spreading or ascending hairs ; leaves rather approximate on the young branches, 

 the petioles sparingly pubescent ; blades of the leaflets oval to suborbicular, 1-2.5 cm. long, 

 sparingly ciliate and with scattered hairs on both surfaces, or sometimes glabrous in age, 

 notched at the apex, the lateral leaflets only slightly more deeply notched than the terminal 



