FLORA. 



Pods densely stellate-pubescent. 



Pods oblong to globose, acute, 4 mm. long ; low perennial. i. L. spathnlata. 



Pods globose, 2 mm. in diameter ; tall annual. 2. L. globosa. 



Pods oval or globose, 4-5 mm. long; tall biennial or perennial. 3. L. argentea. 

 Pods glabrous or very nearly so. 



Annual, sparingly pubescent ; stem slender, 3-6 dm. tall, much branched ; south- 

 western. 4. L. gracilis. 



Perennial, densely stellate ; stem rather stout, 1.5-3 dm. tall, simple ; western. 



5. L. ovalifolia. 



Perennial, 2-15 cm. tall ; stem simple ; arctic. 6. L. arctica. 



1. Lesquerella spathulata Rydberg. Low BLADDER-POD. (I. F. f. 1745.) 

 Perennial, 1-1.3 dm. high; stems slender, simple. Lower leaves oblanceolate or 

 spatulate, 1-2.5 cm. long, acutish, narrowed into a petiole; the upper linear; 

 flowers about 4 mm. broad; pedicels 6-12 mm. long, recurved in fruit; pods 

 oblong or nearly globose, finely canescent, about 4 mm. long, few-seeded, tipped 

 with a style of about their own length. Dry hills, Neb. and S. Dak. to Mont, and 

 the N. W. Terr. June. 



2. Lesquerella globdsa (Desv.) S. Wats. SHORT'S BLADDER-POD. (I. F. f. 

 1746.) Slender, sparingly branched, 1.5-5 dm. high. Basal leaves obovate, 

 24 cm. long, obtuse; stem-leaves narrower, linear or oblong, smaller, sessile; 

 petals 4-6 mm. long; pedicels slender, spreading, 8-10 mm. long in fruit; pod 

 nearly globular, 2 mm. in diameter, glabrous when mature; seeds I or 2 in each 

 cavity; style slender, 4 mm. long. In open places, Ky. and Tenn. to Mo. April. 



3. Lesquerella argentea (Pursh) MacM. SILVERY BLADDER-POD. (I. F. f. 

 1747.) Tufted, nearly simple, 1.5-4.5 dm. high. Leaves linear, oblong or ob- 

 lanceolate, the lower 5-8 cm. long, blunt, entire or sparingly repand-toothed ; 

 petals 6 mm. long; pedicels slender, 1.5-2.5 cm. long in fruit, spreading or re- 

 curved; pod slightly stipitate, stellate- pubescent, globose to oval, 4-5 mm. long; 

 style about equalling the pod. On plains, Minn, to Neb., Kans., Dak. and Ariz. 

 May-June. 



4. Lesquerella gracilis (Hook.) S. Wats. SLENDER BLADDER-POD. (I. F. f. 

 1748.) Weak; stem slender, 2.5-6 dm. high, freely branching, sparsely stellate- 

 pubescent. Leaves linear or oblanceolate, 1.5-5 cm> l n g> their margins often 

 undulate; petals about 6 mm. long; pedicels spreading, sometimes 2.5 cm. long in 

 fruit, ascending or upwardly curved; pod globose, glabrous, 4 mm. in diameter, 

 stipitate; style 4 mm. long. Prairies, Neb. to Tex. March-May. 



5. Lesquerella ovalifolia Rydberg. OVAL-LEAVED BLADDER-POD. (I. F. f. 

 1749.) Basal leaves tufted, broadly oval to nearly orbicular, entire, pale, 2-5 

 cm. long, narrowed into petioles; stem-leaves distant, linear-oblanceolate or 

 narrowly spatulate; fruiting pedicels comparatively stout, ascending, 1-2 cm. long; 

 pods very short-stipitate, subglobose, 5-6 mm. in diameter, glabrous; style about 

 6 mm. long. In dry soil, Neb. and Kans. 



6. Lesquerella arctica (DC.) S. Wats. ARCTIC BLADDER-POD. (I. F. f. 

 1750.) Tufted; stem nearly or quite simple, 2-15 cm. tall. Leaves oblanceolate, 

 spatulate, or oblong, 2.5 cm. long or less, obtuse, entire, the basal ones narrowed 

 into broad petioles, the upper sessile ; petals about 4 mm. long ; pods oval or sub- 

 globose, 4-6 mm. high ; septum perforated ; style 2 mm. long or less. Greenland 

 and arctic Am. Summer. 



Lesquerella arctica Piirshii S. Wats. Taller, sometimes 1.5 dm. high ; septum of 

 the sparsely stellate-pubescent pod unperforated. Anticosti. 



26. HUTCHI'NSIA R. Br. 



Low mostly diffuse herbs, more or less pubescent with forked hairs, our species 

 annual, the small white flowers in terminal racemes, the axis elongating in fruit. 

 Stamens 6. Style wanting or very short. Silicles oval, compressed at right 

 angles to the partition, the valves with a strong midvein. Seeds numerous; 

 cotyledons incumbent or accumbent. [Name in honor of Miss Hutchins, of 

 Bantry, Ireland, an eminent botanist.] About 8 species, natives of the northern 

 hemisphere, only the following known in N. Am. 



i. Hutchinsia prociimbens (L.) Desv. PROSTRATE HUTCHINSIA. (I. F. f. 

 1751.) Tufted, branching near the base, the branches slender, 5-15 cm. long. 



