DIDYNAMIA GYMXOSPERMIA 345 



Calyx sprinkled with yellow resinous dots; teeth short, acute, ciliate-hirsute. 



CorolUi pubescent, reddish white, with purple dots. Stamens included. Slijle 



equally bifid at apex, finally exserted. Akencs oblong, smooth. 



II ib. Hilly woodlands ; along Brandy wine : frequent. Fl. July— Aug. Fr. Sept. 



3. P. lanceolatum, Pursh. Stem pubescent on the angles, corym- 

 bosely branched ; leaves sessile, ovate-lanceolate, and lance-linear, acute, 

 entire, scabrous or ciliate on the margin, the nerves branching from 

 the midrib ; verticils dense, numerous, subfastigiate, terminal and sub- 

 terminal ; bracts linear-lanceolato, sharply acuminate. Benth. Lab. 

 p. 330. 



Var. a. latifolium. Leaves ovate-lanceolate. Benth. I. c. 

 P. verticillatum. Pers. Syn.% p. 128. Jfutt. Gen. 2. p. 33. Ell Sk. 

 2. p. 83. Tow. Camp. p. 235. Beck, Bot. p. 273. Eat. Man. p. 290. 

 Not of Puvsh {fide Benth.). 



Brachystemum verticillatum. Mx. Am. 2. p. 0. Icox, tab. 31. Muhl 

 CataL p. 56. 

 Var. b. angUBtifoUum. Leaves lance-linear. Benth. I. c. 



Nepcta virginica, JVilld. Sp. 3. p. 56. (fide Benth.). Muhl ? Cat. p. 55. 



Also ? Thymus virginicus. JVilld. Sp. 3. p. 145. 



Brachystemum virginicum ? Mx. 1. c. Bigel Bast. p. 237. Not of 



Muhl 



B. lanceolutum. Muhl Catal p. 56. 



Pycnanthemum virginicum. Pers. I. c. Alt. Keiv. 3. p. 377, JVutt. 



I c. Ell. Sk. 2. p. 82. 



P. lanceolatum. Pursh y I c. Bart. Phil. 2. p. 35. Torr. I c. Florul 



Cesir. p. 68. Lindl Ency. p. 506. Beck, I. c. 



Lanceolate Pycxanthemum. 



Root perennial. Stem 2 to 3 feet high, erect, obtusely 4 angled, rough ish-pubes- 

 cent, especially on the angles, often purplish, branched ; branches corymbose, 

 often hoary-pubesccnt. Leaves I to 2 or 2 and a half inches long,— in var. a. I third 

 to 3 fourths of an inch wide,— in var. b. 1 eight to 1 fourth of an inch wide,— some- 

 what pubescent, often nearly smooth except on the margin and nerves, punctate, 

 mostly very entire, upper ones somewhat canescent. Beads of flowers dense, 

 numerous, fastigiatc, terminal and subterminal, canescent ; bracts lanceolate, 

 and lance-linear, imbricated, sharply acuminate, and, with the calyx-teeth, hirsute- 

 ciliate. Corolla pubescent, reddish white with dark purple dots. Stamens scarcely 

 as long as the corolla. Style exscrted, equally bifid at apex. 



Hab. Borders of thickets; old fields, &c. frequent. Fl. August. Fr. September. 



Obs. The narroto- leaved variety has much resemblance to the following spe- 

 cies,— and seems to have been confounded with it, by the early Botanists. Mr. 

 Nutlall, however, has taken the true distinction between them. 



4. P. LiNTFOLiuar, Pursh. Stem smooth ; branches trichotomous 

 and fastigiate ; leaves crowded, linear, acute, very entire, smooth, lon- 

 gitudinally 3-ncrvcd, sessile or subsessiie ; heads of flowers dense, ter- 

 minal, hemispherical, corymbose. Beck, Bot. p. 273. 

 Brachystemon virginicus. Muhl Catal p. 56. Not? of Mx. & Bigel 

 Flax-leaved Pycwaxthemum . 



