HI NORTH AMERICAN FLORA [Volume 25 



7. LOTOXALIS Small, Fl. SE. U. S. 666. 1903. 



Shrubs or partially woody caulescent herbs, with woody roots or rootstocks. Leaves 

 alternate, sometimes clustered at the nodes, the stipules mere dilations at the base of the 

 petiole, or obsolete ; blades pinnately 3-foliolate, the leaflets commonly longer than wide, 

 the blades sessile, that of the terminal one remote from those of the lateral ones by the pro- 

 longation of the rachis, all entire, or notched at the apex but not obcordate. Flowers 

 borne in dichotomous C3 - mes, .the stalks jointed. Sepals 5, persistent, not auricled at the 

 base. Petals 5, yellow, purple, rose, »r whitish, broadened upward, deciduous. Stamens 

 ID, the filaments united into a short tube at the base. Ovary short ; styles filiform or 

 subulate. Capsule short, angled or winged, drooping. Seeds slightly flattened, with 

 longitudinal rows of sharp tubercles, several in each carpel. 



Type species, Oxalis Berlandieri Torr. 



Longer filaments appendaged on the back. 

 Corolla yellow or whitish. 



Blades of the lateral leaflets notched at the apex ; cyme fasciculate. 

 Capsules pubescent on the angles. 

 Sepals pubescent. 



Blades of the leaflets mainly of an obovste or cuneate type. 

 Capsules not surpassing the sepals ; blades of the leaflets of 



a round-obovate type. 1. L.pentantha. 



Capsules surpassing the sepals ; blades of the leaflets of a 



cuneate type. 2. L. Berlandieri. 



Blades of the leaflets mainly of an ovate or lanceolate type. 

 Plants low, with short diffuse branches ; upper leaves with 

 the terminal leaflet quite similar to the lateral ones but 



larger. 3. L. psilotriehia. 



Plants tall, with long upright branches ; upper leaves with 

 the terminal leaflet much longer as well as larger than the 

 lateral ones. 4. L. Neaei. 



Sepals glabrous, except for occasional cilia and a tuft at the apex. 5. L.frutescens. 

 Capsules glabrous. 6. L. occidenlalis. 



Blades of the lateral leaflets acuminate, acute, or obtuse at the apex ; 

 cyme dichotomous, except perhaps in L. angustifolia. 

 Leaflets with linear or linear-oblong blades. 7. L. angustifolia . 



Leaflets with ovate, ovatedanceolate or elliptic blades. 



Blades of the leaflets acuminate. 8. L. glabraia. 



Blades of the leaflets obtuse or abruptly acutish. 9. L. sepium. 



Corolla purple or rose -colored. 10. L. Barrelieri. 



Longer filaments unappendaged. 11. /.. pinelorum. 



1. Lotoxalis pentantha (Jacq.) Rose, Contr. U. S. Nat. 

 Herb. 10 : 116. 1906. 

 Oxalis pentantha Jacq. Oxalis Monogr. 21. 1794. 



Plants 3-50 cm. tall, the larger ones widely branched and diffuse, the older portions of 

 the stem and branches glabrous, the 3'ounger portions finely and partially appressed- 

 pubescent ; leaves mainly crowded or approximate near the tips of the stem and the 

 branches, the petioles more finely pubescent than the stem and branches; blades of the 

 leaflets mostly obovate or orbicular-obovate, 1-2.5 cm. long, or smaller, ciliate and with 

 scattered hairs on the surfaces, especially beneath and there near the veins, those of the 

 terminal leaflets mostly rounded at the apex, those of the lateral ones usually etnargi- 

 nate and considerably smaller ; primary peduncles as long as the petioles or longer ; pedicels 

 2-5 mm. long, rather loosely pubescent ; sepals mostly 4-4.5 mm. long, the outer ones 

 oblong-lanceolate, sparingly pubescent, ciliate and minutely bearded at the tip ; petals 

 yellow, 12-14 mm. long; longer filaments appendaged on the back near the middle and 

 pubescent above the appendage ; capsules broadly oblong, nearly 4 mm. long ; seeds about 

 1.5 mm. long. 



Tvpe locality : Caracas. 



riiSTRiHUTiON : Guatemala to northern South America. 



Illustration : Jacq. Oxalis Monogr. pi. 1. 



2. Lotoxalis Berlandieri (Torr.) Small, Fl. SE. U. S. 666. 1903. 



Oxalis Berlandieri Torr. Bot. Mex. Bound. Surv. 41. 1859. 



Plants 5-25 cm. tall, the stem and branches closely pubescent with loosely spreading 

 hairs which are often very densely set on the younger parts ; leaves scattered on the stem 



