154 CONTRIBUTIONS TEOM THE NATIONAL HERBARIUM. 



6. Limnorchis borealis (Cham.) Rydb. Bull. Torrey Club 28: 621. 1901. 

 Habenana borealis Cham. Linnaea 3: 28. 1828. 

 Type locality: " Unalaschka. " 



Range: Alaska to Colorado and northern New Mexico. 

 New Mexico: Chama (Standleij 6643). Bogs, in the Transition and Canadian zones. 



10. IBIDIUM Salisb. 



Stems erect, from tuberous roots, bearing few leaves near the base; flowers small, 

 white, spurless, spicate, the spikes twisted; sepals and petals all more or less connivent 

 into a hood. 



1. Ibidium strictum (Rydb.) House, Bull. Torrey Club 32: 381. 1905. 



Gyrostachys stricta Rydb. Mem. N. Y. Bot. Gard. 1: 107. 1900. 



Type locality: Indian Creek, Montana. 



Range: Alaska and Newfoundland to Pennsylvania, California, and northern 

 New Mexico. 



New Mexico: Costilla Valley (Wooton). Bogs. 



Subclass DICOTYLEDONES. 

 Order 16. PIPER ALES. 



29. SAURTJRACEAE. Lizard's-tail Family. 



1. ANEMOPSIS Hook. Yerba mansa. 



Perennial herb with long stolons; leaves subcoriaceous, elliptic-oblong or oblong, 

 pellucid-punctate, petioled, mostly basal; flowers very small, crowded on a simple 

 in A'olucrate conic spadix; involucral bracts petal-like, white; ovary solitary, immersed 

 in the rachis; seeds oblong, puncticulate. 



1. Anemopsis califomica Hook. & Am. Bot. Beechey Voy. 390. pi. 92. 1841. 



Eouttuynia califomica Beuth. & Hook.; S. Wats. Bot. Calif. 2: 483. 1880. 



Type locality: California. 



Range : California to Utah and New Mexico, south into Mexico. 



New Mexico: Albuquerque; Mogollon Mountains; Mangas Springs; Berendo 

 Creek; Belen; Rincon; Dog Spring; Mesilla Valley; above Tularosa. Wet alkaline 

 meadows, chiefly in the Lower Sonoran Zone. 



The plants fonn large and conspicuous patches in wet places, especially in alka- 

 line soil. The form found in New Mexico, Arizona, and Chihuahua differs from the 

 typical Californian plant in being smaller and nearly or quite glabrous, and in hav- 

 ing the involucral bracts shorter than the spadix. 



Order 17. SALICALES. 



30. SAIICACEAE. Willow Family. 



Trees or shrubs with simple alternate deciduous leaves; flowers dioecious, in cat- 

 kins; bracts of the aments scalelike; perianth none; stamens 1 to several; ovary 

 1-celled; stigmas 2; fniit a small capsule; seeds very numerous, small, comose. 



key to the genera. 



Bracts incised; disk cup-shaped; stamens numerous; winter- 



buds with several scales 1. Populus (p. 155). 



Bracts entire; disk represented by one or two small glands; 

 ctamens few, generally less than 5; winter buds with a 

 single scale 2. Salix (p. 156). 



