WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 473 
6. Lavauxia taraxacoides Woot. & Stand. Contr. U. 8. Nat. Herb. 16: 155. 1913. 
TYPE LocALiTy: James Canyon, Sacramento Mountains, New Mexico. Type col- 
lected by Wooton, July 6, 1899. 
Rance: Meadows, White and Sacramento mountains of New Mexico, in the Tran- 
sition Zone, 
16. GAURELLA Small. 
Low perennial canescent herb with slender wiry branched stems; leaves alternate, 
sessile, linear-lanceolate, entire or sparingly denticulate; flowers axillary, sessile; 
hypanthium tube slender, canescent, only slightly longer than the calyx lobes; petals 
white or pink, striped with red; capsule sessile, ovoid, sharply 4-angled, 8 to 10 mm. 
long. 
1. Gaurella canescens (Torr.) A. Nels. in Coulter, New Man. Rocky Mount. 341. 
1909. 
Oenothera canescens Torr. in Frém. Rep. Exped. Rocky Mount. 315. 1845. 
Oenothera guttulata Geyer; Hook. Lond. Journ. Bot. 6: 222. 1847. 
Gaurella guttulata Small, Fl. Southeast. U. 8. 844. 1903. 
Type Locauity: ‘‘On the upper waters of the Platte.’’ 
RanaeE: Colorado and New Mexico to Nebraska. 
New Mexico: Sierra Grande (Howell 216), Plains and low hills, in the Upper 
Sonoran Zone. 
101. GUNNERACEAE. Water milfoil Family. 
Aquatic perennial herbs with alternate or whorled leaves, these dissected when 
immersed; flowers inconspicuous, sessile in the axils, perfect, monoecious, or dicecious. 
calyx entire or 4-lobed; corolla small or wanting, of 2 to 4 petals; stamens 1 to 8; ovary 
1 to 4-celled, adnate to the calyx; fruit indehiscent, nutlike, of 2 to 4-seeded carpels. 
KEY TO THE GENERA, 
Leaves entire; stamen 1; ovary l-celled................ 1, Hiepuris (p. 473). 
At least some of the leaves dissected; stamens 4 to 8; 
ovary 4-celled..........2.-2..2222.-22-22-22--- 2. MyRriopHYLLuo (p. 473). 
1. HIPPURIS L. Marestam. 
Smooth erect herb with running rootstocks, growing in shallow water; leaves simple, 
entire, linear, in whorls of 8 to 12; flowers solitary, perfect; petals wanting; fruit 1- 
seeded, drupelike. 
1. Hippuris vulgaris L. Sp. Pl. 4. 1755. 
Type Locauity: ‘‘ Habitat in Europae fontibus.” 
RanaeE: From the arctic regions to California and New Mexico; also in Europe and 
Asia. 
New Mexico: Near Santa Fe; Dulce Lake; near Aztec. In shallow water. 
2. MYRIOPHYLLUM L. WatTeER MILFOIL. 
Smooth leafy aquatic herb with leaves of two sorts, the immersed ones pinnatifid, 
in whorls of 3 or 4; flowers moncecious, the upper ones usually staminate; petals 2 to 
4, wanting in the pistillate flowers; stamens 8; ovary 4-celled; stigmas recurved and 
plumose, 
1. Myriophyllum spicatum L. Sp. Pl. 992. 1753. 
TYPE Loca.ity: ‘‘Habitat in Europae aquis quietis,”’ 
RanGe: Canada to California and Florida, 
New Mexico: La Jara (Standley 8273). In quiet water. 
