ILLECEBRACE.E, (kNOTWORT FAMILY.) 397 



1- P. dichotoma, Nutt. Smooth; stems sleuder, erect ; leaves linear- 

 subulate ; those of the barren stems imbricated; cymes fastigiate, diffuse ; 

 sepals linear, 3-ribbed, slender-pointed. — Rocks on the mountains of North 

 Carolina, and westward. July- Nov. ^ — Stems 6'- 12' high. 



2. P. argyrocoma, Nutt. Minutely pubescent; stems tufted, ascend- 

 ing ; leaves linear, acute ; cymes capitate, the flowers concealed by the large 

 silvery stipules ; sepals lanceolate, hairy, slender-pointed. — Mountains of 

 Georgia and North Carolina. July - Sept. % — Stems 6' -10' high. 

 Stipules nearly as long as the leaves. 



3. P, herniarioides, Nutt. Rough-pubescent; stems prostrate, diffusely 

 branched ; leaves oval or oblong, mucrouate ; flowers axillary, solitary, sessile ; 

 sepals^ubulate, with a short and spreading point. — Dry sand ridges in the 

 middle districts, Georgia to North Carolina. July - Oct. (l) — Stems 4' - 6' 

 long. Leaves 3" - 4" long. 



4. P. Baldwinii, Chapm. Finely pubescent ; stems prostrate, diffusely 

 branched; branches alternate, one-sided, filiform ; leaves lanceolate or ovate- 

 lanceolate, acute, narrowed into a petiole ; cymes diffuse, naked ; sepals ob- 

 long, 3-ribbed, ciliate, short-pointed ; utricle equalling or rather longer than 

 the sepals; style 2-cleft to the middle. (Auychia, Torr. c^- Gray.) — Dry 

 sandy soil, Florida and Georgia. July -Oct. (l) and (2) — Stems |°-1° 

 long. Upper leaves sometimes alternate. 



5. P. riparia, Chapm. Smooth or nearly so ; perennial ; stems several, 

 spreading, branched ; leaves ovate-lanceolate, acute ; stipules very short ; sep- 

 als smootliish ; otherwise like the preceding. — Banks of Flint River, Georgia. 



— Stems lj°-3° long. Leaves .3' long. 



6. P. Rugelii, Shuttlw. Annual, pubescent ; stem erect, successively 

 forking ; leaves oblanceolate, abruptly pointed, shorter than the interuodes, 

 the upper linear ; stipules a fourth to a third as long as the leaves, soon 2-4- 

 pavted ; cymes numerous, terminal, rather loosely flowered ; calyx tube short, 

 pubescent, the linear-lanceolate divisions conspicuously mucronate, white; 

 style included. — Dry sandy soil, Florida, and westward. — Stems 1° high, at 

 length diffuse. 



2. ANYCHIA, Michx. 



Sepals 5, distinct, slightly mucronate at the apex. Stamens 2-3. inserted 

 on the base of the calyx. Style very short. Stigmas spreading. Utricle 

 exserted. Seed erect. Radicle inferior. — An erect slender annual, with 

 forking branches. Leaves oblong, obtuse, narrowed at the base. Flowers 

 minute, solitary or clustered in the forks of the branches, greenish. 



1. A. dichotoma, Michx. Pubescent; stem 6' -9' high ; leaves 3"-6" 

 long, linear-oblong, approximate, like the flowers, on the short erect branches. 



— Open ground in the upper districts. 



Var. capillacea, Torr. Glabrous, taller ; leaves larger and thinner, ob- 

 long, distant on the setaceous spreading branches. — Shady woods in the 

 upper districts. June - July. 



