1921] 
PAYSON—MONOGRAPH OF THE GENUS LESQUERELLA 137 
The limited range of this species is interesting because in the 
vieinity of Nashville, the only place it is known to occur, it is 
reported as being abundant. One wonders what the limiting 
factor in its distribution may be. 
SECTION 2. ENANTIOCARPA Payson 
$ 2. ENANTIOCARPA Payson, new section. 
Annuals or perennials; terminal bud usually developing into 
a fertile stem; radical leaves entire to lyrate; cauline leaves 
auriculate at the base and sessile or narrowed to a petiole; fila- 
ments gradually dilated at the base or linear; pods strongly 
compressed at right angles to the partition; seeds winged or im- 
marginate. Species 2-4. 
KEY TO THE SPECIES 
Leaves more or less toothed or puse ifid. 
Pods nearly orbicular, pendent. «esa ss srar EESE OEI rE . L. lasiocarpa 
Pods elliptical, erect on sigmoid pedicels................... s L. Schaueriana 
Leaves quite ontis... iss 6c sis erte 040 nce e N REIR e es 4. L. frigida 
2. L. lasiocarpa (Hook.) Wats. Proc. Am. Acad. 23: 251. 
1888; Wats. in Gray, Syn. Fl. N. Am. 1': 116. 1895; Small, 
Fl. Southeastern U. S. 469. 1903, and ed. 2, 469. 1913; Pay- 
son, Ann. Mo. Bot. Gard. 5. 143. 1918. 
Vesicaria lasiocarpa Hook. (name only) Bot. Mag. N. S. 10: 
under t. 3464. 1836; Gray, Bost. Jour. Nat. Hist. (Pl. Lindh.) 
6:150. 1850 (name only); Gray, Smithson. Contr. (Pl. Wright.) 
5: 13. 1853 (description). 
Synthlipsis Berlandieri Gray var. hispida Wats. Proc. Am. 
Acad. 17: 321. 1882; Coulter, Contr. U. S. Nat. Herb. 2: 21. 
1891; Heller, Contr. Herb. Franklin and Marshall College 1: 
40. 1895. 
S. heterochroma Wats. Proc. Am. Acad. 17: 321. 1882. 
Alyssum lasiocarpum Kuntze, Rev. Gen. Pl. 2: 931. 1891. 
Annual or biennial; somewhat canescent, with small, irregularly 
branching or stellate hairs and more or less hirsute with simple 
trichomes; stems decumbent or procumbent, 1-6 dm. long, in 
the larger plants usually branched; terminal bud of rosette 
usually developing; radical leaves thin, soon withering, often 1 
dm. long, oblanceolate in outline, irregularly and deeply lyrate, 
obtuse, scarcely petioled; cauline leaves 1-6 cm. long, oblanceo- 
