300 DICOTYLEDONOUS. 



drical sheaths. Flowers whorled, in simple racemes. Leaves of the perianth 

 entire, each bearing a vein on ihe back. Pedicels thick, half an inch long. 

 % June— July. Wet grounds. 1-2 ft. 



4 R Britannicus. Stem branching, tinged with red, furrowed. Leaves 

 broad lanceolate, flat, alternate. Flowers in leafless whorls, forming a com- 

 pound, terminal panicle, polygamous. 



%. April— May. Swamps. 2-3 ft. 



5 R Crispus. -S/ewi erect, angled. Radicle leaves lanceolate, long, acute, 

 undulate, attenuate at the base. Florvers in crowded whorls, pedicillate. — 

 Leaves of the perianth large, cordate, entire, bearing grains. 



% Ma}-— June. Introduced. l-2ft. 



6 R Persicarioides. S(e?n erect, much branched, smooth, often colored. 

 Leaves on short petioles, lanceolate, undulate, entire. Flowers in whorls, — 

 Leaves of the perianth with 3 long teeth on each side, each leaf bearing a 

 grain. 



% July. Wet, shady places. 6-12 in. 



7 R DivARicATUS. Stem erect. Leaves cordate, oblong, pubescent, undu- 

 late. Flowers in whorls, forming a long, slender spike. Leaves of the peri- 

 anth 4 or 5-toothed at the base. 



% June— Aug. Marshes. 1-2 ft. 



8 R AcETOSELLA. i^Zowers dicBcious. (S^tem erect, furrowed. Leaves Ian- 

 ceolate, entire, hastate, on rather long petioles, not auricled. Flowers in fas- 

 ciculate racemes. 



% April — June. Dry sandy soils, very common. 1-2 ft. 



9 R Hastatulus. Flowers dicEcious. Stem erect. Leaves petiolate, ob- 

 long, hastate, with obtuse entire auricles. Perianth persistent, becoming red 

 by age. 



% April. Poor dry soils. 1-3 ft. 



Genus IIL ERIOGONUM. 



Involucre campanulate, many flowered. Perianth 6-cleft. 



Stamens 9. Style 1. Stigmas 3. Seed 1, 3-angled. 



.■ji "^ -a -^ 

 1 E ToMENTOSUM. Stem erect, branching, somewhat dichotomous. 

 Leaves oval-lanceolate, 3 at each division of the stem, sessile, whito, tomen- 

 tose beneath. Lower leaves attenuate at ihe base. Flowers in axillary ses- 

 sile clusters. 



% June— Sept. Sandhills. 1-2 ft. 



Order CXXIX. LAURINE^E. 



Flowers perfect, polygamous and dioecious. Perianth 4-6- 

 cleft. Stamens pprigynous, usually 9, the three inner ones 

 sterile. Anthers adnate, 2-4-celled, with thick connectivum. 

 Ovary superior, single. Style simple, obtuse. Fruit a one- 

 seeded drupe. . Shrubs or small trees, with alternate leaves. 



Genus L LAURUS. 



Genus the same as the Order. 



1 L Carolinensis. A large' shrub, or small tree. Zeave-s- oval-lanceolate, 



coriaceous, perennial, glaucous beneath, entire, rigid. Floioers in small 



clusters, polygamous, pale yellow, exterior segments of the perianth half as 



the interior. Bay galls. 



yi May— June. Swamps. 4-30 ft. 



