Part 1, 1907] OXALIDACEAE 27 



bearing several ovules ; styles about as long as the ovary. Capsule elongate, slender- 

 fusiform, long-beaked. 



Type species, O.valis trilliifolia Hook. 



1. Hesperoxalis trilliifolia (Hook.) Small. 



O.valis trilliifolia Hook. Fl. Bor. Am. 1 : 118. 1831. 



Plants 1-3 dm. tall, with stout rootstocks ; leaves erect, the petioles elongate, some- 

 times conspicuously so, glabrous or pubescent at the top, the leaflets 2.5-4.5 cm. wide, 

 glabrous above, at least in age, with scattered hairs beneath, and glaucous, sometimes cilio- 

 late ; scapes about as long as the leaves or somewhat longer, glabrous or with few scattered 

 hairs near the top ; umbel-like cyme with 2-8 pedicels which become 2-3 cm. long ; sepals 

 lanceolate to oblong-lanceolate, becoming 5-5.5 mm. long, sparingly ciliate near the tip ; 

 petals white or pale-pink, 8-14 mm. long, deeply notched; androecium and gynoecium 

 glabrous ; capsules erect or nearly so, 2.5-3 cm. long, the beak often about one half as long 

 as the body. 



Type locality : Near the Grand Rapids of the Columbia River. 

 Distribution : Washington and Oregon. 



3. OTOXALIS Small, gen. nov. 



Perennial succulent herbs with fleshy rootstocks. Leaves alternate, all basal, or at 

 the tip of the caudex, with minute or obsolete stipules at the base of the petiole ; petioles 

 elongate; blades palmately 3-foliolate, the leaflets sessile or nearly so, with entire obcordate 

 blades. Flowers borne in dichotomous cymes, which are subtended by scale-like bracts. 

 Sepals 5, various, the two outer with broad auricled bases, the two edges of which are 

 turned back, the intermediate one similarly dilated on one side, the two inner ones linear. 

 Corolla salverform. Petals 5, yellow, much longer than the sepals. Stamens 10, the fila- 

 ments united at the base ; staminodia wanting, the filaments thus unappendaged. Ovary 

 somewhat elongate; styles filiform; stigmas 2-lobed, the lobes fimbriate. Capsule and 

 seeds not seen. 



Type species, Oxalis rubrocincta Lindl. 



1. Otoxalis rubrocincta (Lindl.) Small. 



Oxalis rubrocincta Lindl. Bot. Reg. 28 : pi. 64. 1842. 



Plants 1-2 dm. tall; leaves tufted, the petioles sparingly pubescent, stout, the blades 

 of the leaflets 1.5-2.5 cm. long, brittle, slightly notched at the apex, purple-margined and 

 with a row of inframarginal dots, paler beneath than above, ciliolate ; scapes stout, pubes- 

 cent like the petioles ; cymes dichotomous ; pedicels sparingly pubescent or nearly glabrous ; 

 sepals 8-10 mm. long, the outer ones with broadly ovate bodies and narrow tips, the inner 

 ones linear, sparingly pubescent ; petals yellow, cuneate, 11-16 mm. long; capsules not seen. 1 



Type locality : Grown in 1841 at London from seeds collected in Guatemala by T. Hartweg. 

 Distribution : Guatemala. 

 Illustration : Bot. Reg. 28 : pi. 64. 



4. BOLBOXALIS Small, gen. nov. 



Perennial succulent herbs with rootstocks which bear bulblets at their nodes. Leaves 

 alternate, but clustered; petioles elongate ; blades palmately 3-foliolate, the leaflets sessile, 

 witli broadly obcordate or somewhat obreniform blades. Flowers borne in umbel-like cymes 

 which are subtended by scale-like bracts. Sepals 5, nearly equal or the inner ones slightly 

 narrower than the outer, each one bearing a pair of apical tubercles. Petals 5, yellow, 

 tvpically large and conspicuous. Stamens 10 ; filaments united at the base, the longer ones 

 appendaged on the back. Ovary elongate ; styles slender ; stigmas capitate. Capsule 

 oblong or columnar. Seeds tuberculate, wrinkled. 



Type species, Oxalis cernua Thunb. 



'Description drawn from original description and from the plate accompanying it. 



