TETRANDKIA MONOGYNIA, HoUStonia. ' i07 



H. longifolia. WilLd. sp. pi. 1 . p, 583 ? 



Along the sea-coast, in sandy fields : Carolina to Flori- 

 da 7/. May — July. v. v. Flowers purple, 

 6. H. caule erecto superne ramoso ad geniculis pubescente, purpurea. 

 foliis sessilibus ovatis lanceolatis vel lineari-lanceolatis, 

 fasciculis terminalibus corymbosis. WiUd. sp. pi. I. 

 p. 584. 



H. varians, Mich.Jl. amer. l.p. 86. 



Hedyotis umbellata. Walt.Ji. car. 85. 



Knoxia purpurea. Lam. illustr. 1 . p. 25Q. 



In dry woods : Pensylvania to Carolina. %. June, July. 

 V. V. Flowers purple. 



135. AMMANNIA. Gen. pi. 206. 



1. A. caule erecto, foliis lanceolato-linearibus basi dilatata ramosior. 



semi-amplexicaulibus,floribus inferioribus verticillatis. 

 — Willd.sp.pl. l.p. 678. 

 In swamps and inundated fields : Virginia, Carolina, and 

 the western territories. ©.July, Aug. v.v. Flow- 

 ers purple. 



2. A. caule procumbente, foliis lanceolatis in petiolum an- huviihs. 



gustatis, floribus solitariis oppositis sessilibus. — Mich, 

 fi. amer. 1. p.gg. 

 A. ramosior, IValt.Jl. car. 88. 



In gravelly wet places, along rivers : Virginia to Caro- 

 lina. O . Aug. Sept. V. V. Flowers red. 



136. PTELEA. Gen. pi. 1505. 

 1. P. foliis ternatis. IVilld. sp. pi. l.p. 67O. 



Icon. Schmidt arh. 2. t. 76. Mill, ic 2, ^ 21 1. 

 a. P. foliis quinatis. Du Roi. 

 ^. P. foliis pabescentibus. 



In shady moist hedges and on the edges of woods among 

 rocks : New York to Carolina. ^ . June. v. v. A 

 small tree or shrub from ten to fifteen feet high. 

 Flowers small, greenish white, in corymbous clusters. 

 The variety f3 grows in Pensylvania, and appears to be 

 a new species, 



137. CORNUS. Gen. pi. I Q4. 

 * Involucratce capitatce. 

 1. C. herbacea ; foliis summis verticillatis venosi;;, involu- canadensis. 

 cris ovatis acumlnatis, drupis globosis, Willd. sp. 

 pi. l.p. 661. 



trifoliala. 



pentaphylla. 

 pubescens. 



