ORCHIDE.E. 345 



2. P. verticillata Nutt. : leaves 5, oblong-lanceolafe, verticillate ; 

 flower solitary ; 3 outer segments of the perianth very long and li- 

 near ; the inner ones lanceolate, obtuse ; lip 3-lobed, dilated, the mid- 

 dle lobe undulated. Arethusa verticillata Willd. 



HAB. Swamps. N. Y. to Geor. June, July. If. Root fascicu- 

 late. Stem about a foot high. Leaves 5 in a whorl at the top 

 of the stem. -Flower solitary ; outer segments brown, 2 inches 

 long ; inner ones short, paler and obtuse. 



5. CALOPOGON. Brown. 



Lip behind (or inverted,) unguiculate, the lamina bearded ; 

 5 segments of the perianth distinct. Column free. Pollen 

 angular. x , v Gynandria. Monandria. 



C. pulchellus Brown : radical leaves ensiform ; scape few-flowered. 

 Cymbidium pulchellum Willd. Pursh. 



HAB. Swamps. Can. to Flor. June, July. 11 Root bulbous. 

 Stem 12 18 inches high. Leaf generally solitary, 8 10 long, 

 sheathing the base of the stem. Flowers 3 4 in a terminal 

 spike, large, purple. 



6. CORALLORHLZA. Brown. 



Lip produced behind, adnate with the spur or free. Column 

 free. Pollinia 4, oblique, not parallel. 



Gynandria. Monandria. 



1. C. verna Nutt. : leafless ; segments of the perianth linear-lanceo- 

 late, spreading ; lip oblong, without spots, bidentate at the base, the 

 apex recurved and ovate ; spur obsolete, adnate. Cymbidium corallo- 

 rhizon Muhl. "-. 



HAB. Sphagnous swamps. N. S. May. L. Root coralloid. 

 Scape 56 inches high, with about 3 sheathing stipules. Flowers 

 7 15, small, yellowish-green. Lip nearly white, oblong-oval, 

 without spots. Mr. Nuttall in his "Genera of N. A. Plants,'^ 

 confounds this plant with the C. innata of Europe, a mistake 

 which he corrects in his valuable paper on the species of Coral- 

 lorhiza, indigenous to the United States, published in the Mem. 

 of the Phil. Acad. of Nat. Sciences, from which the present 

 descriptions are taken. 



2. C. odontorhiza Nutt. : leafless ; lip oval, undivided, spotted ; spur 

 obsolete, adnate ; capsule subglobose. Cymbidium odontorhizon Willd- 

 Ophrys corallorliiza Mich. 



HAB. Roots of trees. Ver. to Car. Aug., Sept. Z. Root 

 much branched. Scape 10 12 inches high, slender, with 

 about 3 sheaths. Floicers numerous, purplish. Lip dilated, 

 white and beautifully spotted. Dragon's Claw. 



3. C. multiflora Nutt. : leafless; scape many-flowered, (15 30;) 

 lip cuneate-oval, 3-parted, recurved, spotted ; spur conspicuous adnate. 

 <~ C. innata Nutt. Gen. 



