WOOTON AND STANDLEY FLORA OF NEW MEXICO. 473 



6. Lavauxia taraxacoid.es Woot. & Standi. Contr. U. S. Nat. Herb. 16: 155. 1913. 



Type locality: James Canyon, Sacramento Mountains, New Mexico. Type col- 

 lected by Wooton, July 6, 1899. 



Range: 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 Frem. Rep. Exped. Rocky Mount. 315. 1845. 



Oenothera guttulata Geyer; Hook. Lond. Journ. Bot. 6: 222. 1847. 



Gaurella guttulata Small, Fl. Southeast. U. S. 844. 1903. 



Type locality: "On the upper waters of the Platte." 



Range: 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 dioecious- 

 calyx entire or 4-lobed; corolla small or wanting, of 2 to 4 petals; stamens 1 to 8; ovary 

 1 to 1-celled, adnate to the calyx; fruit indehiscent, nutlike, of 2 to 4-seeded carpels. 



KEY TO THE GENERA. 



Leaves entire; stamen 1; ovary 1-celled 1. Hippuris (p. 473). 



At least some of the leaves dissected ; stamens 4 to 8; 



ovary 4-celled 2. Myriophyllum (p. 473). 



1. HIPPURIS L. Marestail. 



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. PI. 4. 1755. 



Type locality: "Habitat in Europae fontibus." 



Rangk: From the arctic regions to California and New Mexico; also in Europe ami 

 Asia. 



New Mexico: Near Santa IV; I Mike Lake; near Aztec. In shallow water. 



2. MYRIOPHYLLUM L. WATBB milfoil. 



Smooth leafy aquatic herb with leaves of two - ( ,rts, th<> immersed ones pinnatifid, 

 in whorls of :; or 1; flowers monoecious, the upper ones usually Btaminate; petals 2 to 

 4, wanting in the pistillate flowers; stamens 8; ovary L-celled; stigmas recurved ami 

 plumose. 



1. Myriophyllum spicatum L. Sp. PI. 992. 1753. 

 Type locality: "Habitat in Europae aquia quietia." 

 Range: Canada to California and Florida. 

 \kw Mkxici- LaJara (Standley 8273). In quiel water. 



