154 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
6. Limnorchis borealis (Cham.) Rydb. Bull. Torrey Club 28: 621. 1901. 
Habenaria borealis Cham. Linnaea 8: 28. 1828. 
Type LocaLity: ‘‘Unalaschka.’’ 
RanGE: Alaska to Colorado and northern New Mexico. 
New Mexico: Chama (Standley 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 82: 381. 1905. 
iyrostachys stricta Rydb. Mem. N. Y. Bot. Gard. 1: 107. 1900. 
TYPE LocALITY: Indian Creek, Montana, 
Rance: Alaska and Newfoundland to Pennsylvania, California, and northern 
New Mexico, 
New Mexico: Costilla Valley (Wooton). Bogs. 
Subclass DICOTYLEDONES. 
Order 16. PIPERALES. 
29. SAURURACEAE. 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 
involucrate conic spadix; involucral bmcts petal-like, white; ovary solitary, immersed 
in the rachis; seeds oblong, puncticulate. 
1. Anemopsis californica Hook. & Am. Bot. Beechey Voy. 390. pl. 92. 1841. 
Houttuynia californica Benth. & Hook.; 8S. Wats. Bot. Calif. 2: 483. 1880. 
TypPE Locauity: 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 form 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. SALICACEAE. Willow Family. 
Trees or shrubs with simple alternate deciduous leaves; flowers dicecious, in cat- 
kins; bracts of the aments scalelike; perianth none; stamens 1 to several; ovary 
1-celled; stigmas 2; fruit 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. Popunus (p. 155). 
Bracts entire; disk represented by one or two small glands; 
stamens few, generally less than 5; winter buds with a 
single scale...... 2.2... 200 2 eee eee eee eee eee eee eee 2. Saux (p. 156). 
