ILLECEBRACE.E. (KNOTWORT FAMILY.) 397 



1. P. dichotoma, Nutt. Smooth; stems slender, 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. y. 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. 2/ 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 subulate, 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-side 1, 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. $ Gray.) Dry 

 sandy soil, Florida and Georgia. July -Oct. (T) and @ Stems ^-l 

 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 smoothish ; otherwise like the preceding. Banks of Flint River, Georgia. 



Stems l^-3 long. Leaves r,' long. 



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

 forking ; leaves oblauceolate, abruptly pointed, shorter than the internodes, 

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

 parted ; cymes numerous, terminal, rather looselv 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. 



