S48 3. CIIIC^.A LUTETIANA. [CL. II. 



inverted heart-shape, shorter than the two filaments. The 

 filaments stand before tlie calyx leaves, and alternate like 

 them with the petals, (19().) The stigmata are two. The 

 ai'stivation is valvular. 



The capsule consists of two loculi, opens from below, and 

 t'ontains in each loculus a seed, which, without any albumi- 

 nous matter, contains a com})letely unfolded embryon, with 

 two erect, thickish cotyledons, and a radicle scarcely distin- 

 guishable. 



A subspecies of this plant is produced in mountain forests, 

 and especially in North America, with a smoother stem, with 

 the leaf-stalks completely linear and smooth, and with leaves 

 more softly ciliated. This is the Circcea hitermedlay Ehrh. 

 beytr. 4. s. 42. St^irm Deutsch. Flor. Heft. 23. C. Lute- 

 tiana Canadensis Michaux^ bo. ram. 1. p. 17. Pursh, Amei'. 

 Sept, 21. Nuttall, 18. 



The Circ^a alpina, again, is essentially distinguished 

 by a smooth, branchy stem, which is never longer than a 

 small span, and by small cordate leaves. There is also a 

 small bractea under every flower, which is Avanting in our 

 species. 



Geographical Distribidion. 



The Circdca lutetiana appears to be diffused in the northern 

 hemisphere from 37° to the 64° N. Lat. For Sibthorp found 

 it in the Bithynian Olympus, and Marshall of Biberstein in 

 Tauris. On the other hand, it is wanting in Lapland, where, 

 instead of it, the Circtea alpina grows. Its limits in North 

 America have not yet been exactly determined. But it seems 

 to grow from 40 '' to the 50^ N. I.at. 



Sijnonymcs and Figures. 



C'irc.Ta lutetiana, Loh. Hist. 137, ic. 206. Gcr. Emac. 351. 

 Ocymastrum verrucarium, J. Bauli. H'lsi. 3. 977. Solani- 

 folia C'ircaia dicta, C. Bauh. Pin. 68. Park. Theatr. 351. 

 J/o/7'.s. s. 5. t. 34. (C. lutetiana, Dalcch. 1338. is C. alpU 



