4792 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
15. LAVAUXIA Spach. 
Low, acaulescent, annual or perennial herbs, with simple or lyrate leaves and large 
yellow or white flowers; hypanthium tube often much elongated; capsules stout, the 
angles variously appendaged or smooth; seeds few. 
KEY TO THE SPECIES, 
Tips of the calyx segments not free in bud; leaves copiously hir- 
BUte. ccc eee cece eee 1. L. primiveris. 
Tips of the calyx segments free in bud; leaves not hirsute, or if s0 
only on the petioles, 
Leaves thick, grayish, densely cinereous, entire or but little 
lobed. 
Petals 4 cm. long or less; capsules ovoid or ellipsoid... . 2. L. brachycarpa. 
Petals 5 to 6 cm. long; capsules attenuate to the apex.... 3. L. wrightii. 
Leaves thin, bright green, not cinereous, deeply pinnatifid or 
lyrate. 
Capsules with divaricate hooked beaks on the angles above 
the middle... 2.2.2.2. 00.2 4. L. hamata. 
Capsules with smooth angles. 
Petals 20 mm. long; leaves with very numerous 
crowded lobes.............2..222----2-2-2---. 5, DL. flava. 
Petals 35 to 40 mm. long; leaves with few distant 
Ce) 6. L. taraxacoides. 
1. Lavauxia primiveris (A. Gray) Small, Bull. Torrey Club 28: 182. 1896. 
Oenothera primiveris A. Gray, Pl. Wright. 2: 58. 1853. 
TYPE Locauity: ‘‘Dry hills near El Paso,.”’ Type collected by Wright (no. 1376). 
Rance: Western Texas to southern New Mexico. 
New Mexico: Rincon; Organ foothills; Mesilla Valley; Tres Hermanas. Low 
hills and mesas, in the Lower Sonoran Zone. 
2. Lavauxia brachycarpa (A. Gray) Britton, Mem. Torrey Club 5: 235. 1894. 
Oenothera brachycarpa A. Gray, Pl. Wright. 1: 70. 1852. 
Type Locauiry: ‘Between western Texas and El Paso,’’ 
RanGe: Western Texas and southern New Mexico. 
New Mexico: Hillsboro; Big Hatchet Mountains; Kingston. 
3. Lavauxia wrightii (A. Gray) Small, Bull. Torrey Club 28: 183, 1896. 
Oenothera wrightii A. Gray, Pl. Wright. 2: 57. 1853. 
TyPE Locatiry: Stony hills near the Copper Mines, New Mexico, Type collected 
by Wright (no. 1072), 
Rance: Southern New Mexico. 
New Mexico: Santa Rita; San Andreas Mountains. 
4. Lavauxia hamata Woot. & Standl. Contr. U. 8. Nat, Herb. 16: 154. 1913. 
TYPE LocaLity: Socorro, New Mexico, Type collected by G. R. Vasey, May, 1881. 
Range: Known only from type locality. 
5. Lavauxia flava A. Nels. Bull. Torrey Club 81: 243. 1904. 
TYPE Locairy: Laramie, Wyoming. 
Range: Wyoming to New Mexico. 
New Mexico: Rio Pueblo; Winsors Ranch; Pecos; Tunitcha Mountains; Raton; 
Chama; Farmington; Gallo Spring. Moist meadows, in the Transition Zone, 
