IRIS. TRIANDRIA. MONOGYNIA. 37 



only an accidental variation. The 1. versicolor of Curiis^ 

 Bot. Ma^. t. 21, Dr. Bigelow supposes, and I think with 

 much reason, to be only a luxuriant variety of our common 

 species : the stem is represented much more flexuous than I 

 have ever observed it. 



3. I. lacustris JV u 1 1. : flowers without a bearded crest ; 

 leaves eiisiform, much shorter than the 1 -flowered scape ; pe- 

 tals nearly equal, attenuated on the tube ; capsule turbinate, 

 3-sided, margined; roots tuberous. JSfutl. Gen. I. p. 23. 

 Torrey in Sill. Jour. IV. p. 57. 



Roots extensively creeping and forming dense tufts. Leaves 

 3 — 5 inches long, and about a quarter of an inch broad. Scafie 

 compressed, not an inch long, clothed with very short leaves, 

 or rather sheaths. Petals obtuse and emarginate, pale blue, 

 the exterior ones marked with a slight crest I the interior ones 

 narrower, but about the length of the others. Stigmas shorter 

 than the petals. ^ ; 



Kab. On the gravelly shores of the calcareous islands of Lake 

 Huron, near Michilimacinack. Xuttall. I have specimens 

 from Presq-Isle in the same lake, collected by Catit. Dou g- 

 lass., who found it abundant among the pebbles on the shore. 

 Found in flower June 5th. 



The flowers of the species of Iris being of such delicate 

 structure that they lose many of their characters in drying, I 

 am unal)le to determine whether the plant above described is 

 distinct from I. cristata of A it on. It does not dilTer from 

 the description in the Hort. Keivensis, except in having, ac- 

 cording to J^fu (tall, flowers destitute of a bearded crest. It 

 appeared to me, however, in the specimens collected by Capt. 

 Douglass which I examined, that there was an indistinct crest 

 on the outer petals, which might have been more elevated in 

 the living plant. Mr. .A'u 1 1 all himself remarks, that it ap- 

 pears allied to I. cristata, and that he had seen no perfect spe- 



cmiens. 



27. LACHNANTHES. Elliolt. 



Calyx superior, petaloid, externally hirsute, deep^v 

 6-parted, nearly equal. Style declining; stigma mi- 

 nutely 3-lobed. Capsule globose, 3-celled; cells 

 3 — 6-seeded. Elliott Sk. I. p. 47. Dilatris 

 jXutt. Gen. I. p. 24. Heritiera Mich. Fl. I. 

 p. 20. Anonymos IValt. Car. p. 67. Nat. Ord. 



IrIDES JllSS. H^MODORACEiE E. BroxvTi. 



h.tindoria Ell. I.e. Anonymos /mc/on Walt. I.e. 

 Heritiera tinclorum Bo s c. Bull, de la Soc. philom. n. 1 9. 

 p. 145. (fide R. S,r S.) Redo u i e I iliac. V. t. 247. G m c L 



