IOWA ACADEMY OP SCIENCE 
47 
CALOPOGON R. Br. 
263. Calopogon pulchellus (Sw.) R. Br. Grass Pink. Rare; found but 
once near Oxford. 
* SPIRANTHES Richards. 
264. Spiranthes cernua (L.) Richard. Lady’s Tresses, Common in 
moist meadows. 
EPIPACTIS (Haller) Boehm. 
265. Epipaciis pubescens (Willd.) A. A. Eaton. Rattle Snake Plan- 
tain. Rare in woodlands along the Iowa River. 
LIPARIS Richard. 
266. Liparis lilifolia (L.) Rich. Large Twayblade. Not rare in rocky 
woodlands; State Quarry. 
APLECTRUM (Nutt) Torr. 
267. Apl&ctrum hyemale (Muhl.) Torr. Putty Root, Rare in wood- 
lands along Iowa River. 
SALICACEAE. 
SALIX (Tourn) L. 
268. Salix nigra Marsh. Black Willow. Rather scarce in bogs. 
269. Salix amygdaloides Anders. Peach-leaved Willow. Very common 
especially along streams. 
270. Salix lucida Muhl. Shining Willow. Rare. 
271. Salix fragilis L. Crack Willow. Cultivated and occasional as an 
escape. 
272. Salix alba Var. vitellina (L.) Koch. White Willow. Common in 
cultivation. 
273. Salix babylonica L. Weeping Willow. Cultivated and rarely as 
an escape; Riverside. 
274. Salix cordata Muhl. Pleart-leaved Willow. Not scarce in bogs 
and marshy woods. 
275. Salix longifolia Muhl. Sand-bar Willow. Common along streams. 
276. Salix missouriensis Bebb. Missouri Willow. Plenty along streams. 
277. Salix discolor Muhl. Glaucous Willow. Rather scarce along 
streams. 
278. Salix Jiumilis Marsh. Prairie Willow. Common in hillside thickets. 
