90 DIADEIPHIA. OCTANDRIA. 



oblong-ovate, acute. Hab. In sphagnose swamps from 

 Sussex county, Delaware, to Florida. Flowering- in July 

 and August. Obs. Stem about 12 inches high; stem leaves 

 about an inch long, of the same length nearly to the 

 summit of the stem, oblong-linear and somewhat obtuse; 

 the whole corymb citron yellow, in a dried state blackish 

 green; cojolla cristate as in the following species, though 

 Very inconspicuously so. 



19. * aitennatn. Perennial; stem tall, simple, terete, 

 and attenuated, summit corymbose, many-flowered; radi- 

 cal leaves, spalhulate-lanceolate, acute, cauline subulate, 

 unequal; calicine wings connivenr, elliptic-oblong, acute. 

 Hab. In grassy swamps from North Carolina to Florida, 

 very similar to the preceding, but much larger, from 2 

 to 3 feet high, hence Dr. Baldwyn called it P. prxalta, but 

 as the following species is equally tall, and many foreign 

 species much more so, I have chosen ihe present name 

 as expressive of the singularly attenuated appearance of 

 the stem, the flowers are of the same color as in P. co- 

 rijmbosa. 



20. * Baldnini. Perennial? Stem tall, sparingly and 

 virgately branched; flowers squarrosely capitate, capituli 

 corymbose, whitish; wings of the calix connivent, lanceo- 

 late, setaceously acuminate; radical leaves spathulate, 

 obtuse, cauline sublanceolate, acute. Hab. Near St. 

 INlary's in Florida. — Dr. Baldwyn, from whom I received 

 a specimen under the name of P. poli/cephala. Obs. A 

 very singular and distinct species. Stem 2 to 3 feet high, 

 branclied from below the middle, branches 2 to 5? angu- 

 lar, summits corymbosely branclied; leaves small and dis- 

 tant, smooth, alternate, sessile, flowers greenish-white, 

 imbricately capitulate, appearing squarrose from the 

 .spreading setaceous points of the calix; corolla almost 

 perfectly beardless; capsule 2-celled, 2-seeded, very mi- 

 nute, seed hirsute, and subglobose, after the manner of 

 the genus. 



I have not here adopted the artificial sections of this 

 genus, viz. those of the ciistate and beardless corolla, be- 

 cause they do not appear to exist in nature, judging from 

 a careful examination of the 20 species here enumerated, 

 Jn which I find it impracticable to draw any definite line, 

 all possessing, more or less evidently the filiform processes 

 of the carinate petal; in P. Sc7iega^ P. piibescens, P. pur- 

 piireCf P. sanguinea and P. Balduini, it is indeed redu- 

 ced to the appearance of glanduloid excrescences, in all 

 the others it is more or less apparent and filiform, accord- 

 ing to the size of the corolla. 



Of this vast genus, containing more than 100 species. 



