216 HALORAGE^. [Callitriche, 



acutis. DC, — Linn, in ^^ Act Ups. 1741, p. 81." Mich, Am, v. 1. p, 76. Pursh, FL Am. 

 V, \.p. 92. De Cand. Prodr. v, 3. p, 67. Elliott^ Carol v, I. p, 81. BigeL Fi, Bost ed, 2. 

 p. 48. 



Hab. Canada. Pursh, 



2. MYRIOPHYLLUM. Vaill. 



Flores monoici aut rarius hermaphroditi. $ . Calyx 4-partitus. Petala 4 lobis cal. al- 

 terna valde caduca ovata. Stam, 4, 6 aut s£epius 8. ? . Calyx ovario adhaerens, limbo 4- 

 lobo. Petala 0. Carpella 4 subconcreta compressa aut subglobosa nucumentacea indehis- 

 centia 1-sperma. Semina in loculis solitaria pendula, albumine nullo, embryone teretiusculo 

 inverse, cotyledonibus obtusis, radicula longa. — Herbse aquaiiccB natantes^ apicihus ad 

 anfhcsin emersis. Folia opposite aut verticillata, Flores parvi ad axillas verticillati^ aut 

 foliis Jloralihus subahortivis verticillato-spicati, super, mascidi, infer, foeminei, DC, 



1. M, spicatum ; foliis verticillatis pinnatipartitis, lobis capillaceis, spica terminali nudi- 

 uscula, foliis floralibus flore (8-andro) brevioribus, infimis subserratis plerisque integerrimis, 

 DC. — Linn, Sp. PL p. 1409. Fngl. Bot. L 83. Mich. Am. v. 2. p. 190. Pursh. Fl. Am, v, 

 1. p. 274. Rich, in Frankl, 1st, Journ. ed. 2. App. p. 36. Bigel. Fl, Bost. ed, 2. p. 346. 

 De Cand. Prodr, v, 3. p. 68. 



Hab. In pools and still waters, Canada. Mickaux; as far north as the Bear Lake. Dr. Richardson^ 

 Drurimiond. 



2. M. verticillatum ; foliis verticillatis pinnatipartitis, lobis capillaceis oppositis, spica termi- 

 nali foliosa, foliis floralibus omnibus pinnatipartitis flores (8-andros) multo superantibus et 

 a foliis vix distinctis. DC. — Linn. Sp, PL p. 1410. Engl. Bot. t, 218. Mich, Am. v. 2. p. 

 190. Pursh, FL Am. v. 1. p. 271. Elliott^ Carol v. 2. p. 588. De Cand, Prodr. v, 3. p. 68. 



Hab. Stagnant waters, Canada. Michaux. 



3. M. tenellum ; caule simplice subapliyllo basi radicante erecto, foliis squamaeformibus al- 

 ternis integris, summis in axilla floriferis, spica terminali interrupta alterniflora. DC. — Bigel. 

 FL Bost. ed, 2. p. 346. De Cand. Prodr. v. 3. p, 69.— M. nudum. Lapylaie^ MSS. (DC) 

 — Hylas apliyllus. Bigel. MSS, in Herb. Boott, apud. nostr, 



Hab. In watery places, Newfoundland. Lapj/laie, in De Cand. Prodr.- — Of this I hare seen no 

 specimen from the British Possessions of North America; hut it has been found hy M. de Lapylaie in 

 Newfoundland, and in the Northern United States appears to he not unfrequent. I possess excellent speci- 

 mens from Mr. Nuttall, Dr. Torrey, and especially from Dr. Boott, and I purpose to illustrate this interesting 

 plant and its affinity M. procumbens, Bigel. Fl. {H^^las pinnatus, ejusd. MSS. in Herb. Boott,) hy figures in 

 the Botanical Miscellany, 



Trie. II. Callitrichine^. Link^ DC, 



3. CALLITRICHE. Lirni. 



Flores pol^'gami, hermaphroditi, dioici aut ssepius monoici. Bractem 2 oppositse petal- 

 oideae ad basin floris (petala, auct.) Calyx non conspiciuis, verosimiliter ovario basi adhe- 

 rens limbo abortive. Petala 0. ^.Stam. 1. (rarius 2) filamentis filiformibus exsertis, 

 anthera reniformi I-loculari sutura transversa dehiscente. % , Ovarium bisulcum quadri- 

 loculare, in quolibet loculo uniovulatum. Styli 2 filiformes, gfandulosi. Capsnla compressa 



