860 DIDYKAMIA GYMNOSPERMIA 



tube with a hairy ring within towards the base. Filaments pubescent. Akcnet 

 roundish-oval, subtriquetrous, externally convex, roughish-dotted, greenish-brown. 

 Hab. Moist thickets; along rivulets, <5cc. frequent. FL August. Fr. September. 

 06s. Our American species of Stachys afford varieties which seem to have 

 their characters blended ; and I fear there is s>me confusion In the nomenclature 

 The plant here intended has the leaves considerably rcsombling those of S. pa. 

 lustris, of Europe, in form,— but they are thin, smooth, and constantly petiolate 

 and the calyx is generally quite smooth. There is a variety of it, however, with 

 the leaves more ovate-lanceolate, subcordate at base, and the stem more hispid. 

 The varieties of this are probably all included, by Bentham, under the S. aspera. 



2. S. sylvatica, L? Stem very hispid; leaves on short petioles, 

 cordate-ovate, or ovate-lanceolate, acuminate, crenatc-serrate, hirsute ; 

 verticils 4 to 6-flowered ; floral leaves hispid-ciliate ; calyx hirsute, with 

 ciliate teeth. Beck, Bot. p. 279. 



S. aspera? JMuhl. Catal.p.55. Biff eh Host. p. 236. Not? of Pursh, 

 Bart. Ell. Torr. Beck, & Eat. 



Also? S. hispida. Autt. Gen. 2. p. 30. Not? of Pursh, Ell.U Eat. 

 Wood Stachys. 



Root perennial. Stem I to 2 feet high, rather stout, branching, mostly very 

 hispid on the angles. Leaves 2 to 4 inches long, and 1 to 2 and a half inches wide, 

 varying from subcordate to ovate-lanceolate, obtusely serrate, hirsute on the upper 

 surface, and hispid-pilose on the nerves beneath, somewhat rugose ; petioles I 

 eighth to half an inch long, hispid-ciliate. Verticils 4 to 6-ttowered, in the axil* 

 of rather crowded hispid-ciliate floral leaves; flowers larger than in the preceding; 

 bracts subulate, minute, hispid-ciliate. Calyx hirsute on the nerves; teeth lance- 

 olate, ciliate, finally rigid. Corolla purple, spotted, hairy externally ; tube with a 

 hairy ring within. Stamens finally bent over the side of the corolla ; filaments 

 pubescent-ciliate. 



Hab. Low shaded grounds; Brandywine: frequent* Fl. July— August. Fr. Sept. 



Obs. This is probably the S. sylvatica, of Nuttall ; but it seems to be different 

 from the European plant of that name,— especially in its shorter petioles. The 

 leaves, also, are often more oblong, or lanceolate. Some of my specimens ap- 

 proach the description of S. mcxicana, Bcnth. Lab. p. 541. If ours should prove 

 to be distinct from those described by Bentham, it might be established as S. his- 

 pida. Two or three additional species are enumerated in the U. States ; but they 

 require a careful revision. 



290. MARRUBIUM. L. Jfutt. Gen. 507. 

 [Etymology obscure ; supposed to be from a town in Italy.] 



Calyx tubular, 5 to 10-nerved, nearly equally 5 or 10-toothcd ; teeth 

 erect, or finally spreading. Corolla bilabiate ; upper lip erect, fiattish, 

 or concave, entire, or bifid; lower lip spreading, 3-lobed, middle lobe 

 broader, mostly emarginate ; tube included. Stamens included, lower 

 ones longer ; anthers 2-celled ; cells divaricate. Akenes obtuse, not 

 truncate. 



1. M. vulgabe, L. Stems ascending, hoary-tomentose ; leaves round- 

 ish-ovate, or oval, crenate-dentate, softly villose and canescent beneath; 

 ▼erticils many-flowered, woolly and canescent; calyx with 10 subulate 

 uncinate teeth. Beck, Bot. p. 280. 

 Common Mabbubium. Vulgo — Hoar-hound. 



