PLANTS OF RHODE ISLAND. 43 



SAGITTARIA, L. Arrow-Head. 



1. variabilis, Engelm, var. obtusa. 



var. latifolia. 

 var. hastata. 

 var. diversifolia. 

 var. angustifolia. 

 var. gracilis. 



2. calycina, Engelm. Woonasquatucket, &c. 



3. graminea, Michx. Benedict's Pond, &c. 



4. heterophylla, Pursh. Olney. 



Order 90. HYDROCHARIDACE^. 

 ANACHARIS, Richard. Water- Weed. 

 Canadensis, Planchon. 

 VALLISNERIA, Micheli. Tape Grass, Water Celery. 

 spiralis, L. Harrington, &c. 



Order 01. ORCHIDACE^. 



ORCHIS, L. Orchis. 

 spectabilis, L. Scituate, Flint. 



H A B E N A R I A , R. Br. Orchis. 



1. tridentata. Hook. 



2. virescens, Spreng. 



3. viridis, R. Br., var. bracteata, Reich. Lime Rock. 



4. Hookeri, Torr. Hunt, Flint. 



0. ciliaris, R. Br. Yellow Fringed Orchis. 



6. blephariglottis. Hook. White Fringed Orchis. 



var. holopetala. Hedge ; Quidnessett, 

 Bennett. 



7. lacera, R. Br. Ragged Fringed Orchis. 



8. psycodes, Gray. Small Purple Orchis. 



9. fimbriata, R. Br. Large Purple Orchis. So. Kingstown. 



G O O D Y E R A , R. Br. Rattlesnake Plantain. 



1. repens, R. Br. Smithlield; rare. 



2. pubescens, R. Br. 



SPIRANTHES, Richard. Ladies' Tresses. 



1. cernua, Richard. 



2. graminea, Lindl., var. "Walteri. 



3. gracilis, Bigelow. 



4. simplex. Gray. E. Greenwich, Congdon. 



L I S T E R A , R. Br. Twayblade. 

 cordata, R. Br. So. Kingstown. 



