Liparis.-] ORCHIDEiE. 193 



2. UDORA. Nutt. 



Dioica. Spatha bifida. Masc. Cal 3-partitus. Cor. 3-petala. Stam, 9, 3 interlora. 

 FcEM. Cal. S-partitus, tubo longissimo. Fet 3. Filamenta sterilia 3. Utriculus subtri- 

 spermus. Semina cylinclrica. Nutt-^Herba aquatka, foliis vertlcillatis. 



1. U. verticillata. 5i?rcn^.—Udora Canadensis. Nutt. Gen. Am. 2. p. 2^2, Elodea. Mr. 

 Serpicula verticillata, L.—MukL—S. occidentalis. Ph, 



Hab. Canada, {MicJiaux. Cleghorn. Goldie,) to the Saskatchawan, Br Richardson. Dnemmond.-—! 

 have retained the name oi verticiltata to this, originally given to an East Indian Udora, from a conviction, 

 as far at least as can be conveyed by the dried specimens, that the plants of the Old and of the New World 

 are the same species. It extends throughout the whole continent of America, from the lat. of York Factory, 

 Hudson's Bay, in the north, to Buenos Ayres and Valparaiso in the south. The leaves vary much in size 

 and direction, so that probably the U. {Eloded) Granatensis, and U. Orinocensis of Humboldt and Kunth. 

 are mere varieties. Certainly my specimens from British Guiana are the same as those from Canada. 



Ord. XV. ORCHIDE^.* Juss. 



§ I. Malaxide;e. Lindl. 



1. MICROSTYLIS. NutL Lindl 



1. M. monophyllos (Lindl. Gen. Orch. p. 19.) ; caule unifolio, racemo graciJi elongate, 

 pedicellis flores sequantibus. — Lindl. — M. brachypoda. Gray, Mss. in Herb, nostr. — Ma- 

 laxis monophyllos. Willd. — Ophrys. i. 



Hab. Near Montreal. Goldie in Herb, nostr, Halifax. Goldie (ex Lindl.) — A very distinct species 

 from the following, (a European plant,) and first found in N. America by Goldie, and since by Drs Torrey 

 and Gray, in the United States, at Oneida county, New York. » 



r 



L 



2. M, ophioglossoides (Nutt.) ; caule unifolio, racemo obtuso capitato multifioro, pedi- 

 cellis flores longe superantibus, labellotridentato. — LindL BoL Beg. L 1290. (var. /3.) Gen. 



Orch. p. 19. Malaxis ophiog. Fh. Am. \.p. 592. Loddig. Bot. Cal p. 1116. M, uni- 

 folia. Mx, 



Hab. Canada," to the Saskatchawan. Dr Richardson. Newfoundland. JDr Morrison. Nova Scotia. 

 Menzies. 



3. M. diphyllos (Lindl. Gen. Orch. p. 19.); foliis duobus ovatis lanceolatisve acutis 

 laevibus, scapo triquetro, labello subrotundo acuminate acumine lacinias baud superante. 



Malaxis dipbyllos. Cham, in Linnaea, 3. p. 34. 



Hab, Unalaschka. Chamisso. — This is equally unknown to me as it is to Dr Lindley. 



2. LIPARIS. Rich. 



I. L, liliifolia (Rich.); foliis binis oblongis acutis plicatls racemo paucifloro multo 



* I have followed entirely the arrangement of Dr Lindley, to whose invaluable Genera and Species of 

 Orchideous Plants I refer for the characters of the Genera, so far as that work is published. 



vou II. 2 b 



