174 FLORA OF WINNESHIEK COUNTY. 
Gyrostachys gracilis (Bigel.) Kuntze. (Spiranthes gracilis 
Bigel.) Slender Ladies’ Tresses. Decorah (Arthur). 
Peramium pubescens (Willd.) MacM. (Goodyera pubescens 
R. Br. Rattle-snake Plantain. In deep upland woods. Not 
rare. Hesper. 
Acroanthes unifolia (Michx.) Raf. (Microstylis ophioglosso- 
ides Nutt.) Green Adder’s Tongue. In deep woods. Decorah 
(Arthur), Hesper (Arthur). 
Leptorchis liliifolia (L.) Kuntze. (Liparis liliifolia Rich.) 
Large Twayblade. Not rare. In deep upland woods. Ken- 
dallville, Hesper. 
Aplectrum hyemale (Muhl.) ‘Torr. Putty-root. Locally 
common in deep woods southward. Ft. Atkinson. 
Corallorhiza multiflora Nutt. Large Coral-root. Very com- 
mon in deep upland woods northward. Hesper. 
SUB-CLASS II. DICOTYLEDONES. 
Series I. 
Order 1. Salicales. 
Family Salicacee, Poplars; Willows. 
Populus alba L.  Silver-leaf Poplar. Naturalized in waste 
places. Decorah. 
Populus candicans Ait. (P. balsamifera var. candicans 
Gray.) Balm of Gilead. Seemingly native on banks and 
slopes along the Upper Iowa. Kendallville, Calmar (culti- 
vated). 
Populus deltoides Marsh. (P. monilifera Ait.) | Cottonwood. 
Common along streams. Decorah (Savage), Calmar. Also 
observed at Ft. Atkinson, Kendallville, Bluffton, ete. 
Populus grandidentata Michx. Large-toothed Aspen. In 
upland woods. Notcommon. Decorah (Savage), Hesper, north 
fork of Bear creek. Also observed at Moneek. Kendallville, 
Canoe creek, and south fork of Bear creek. 
Populus tremuloides Michx. American Aspen. Very com- 
mon in thickets, upland woods, etc. Decorah. Observed at 
all the other localities in the county. 
‘Salic nigra Marsh. Black Willow. Not rare. In low 
grounds along Turkey river. Ft. Atkinson. Observed at 
Bluffton. 
