198 EUPHORBIACEAE 



C. Am. Also in the W. I. and S. Am. Pennsylvania : Philadelphia, 

 on or near ballast, , 



3. CROTONOPSIS Michx. 

 1. Crotonopsis linearis Michx. Crotonopsis. (Man. p. 5S7 ; I. F. 

 y. 2294-) In dry sandy soil, N. J. to Kans., south to Fla. and Tex. Penn- 

 sylvania : Bucks, Bristol. 



4. ACALYPHA Iv- 



Staminate and pistillate flowers in separate spikes : capsule spiny. 



I. A. ostryaefolia. 

 Staminate and pistillate flowers in the same spikes : capsules smooth. 



Plant pubescent: bracts palmately lobed, equalling or exceeding the stam- 

 inate spike. 2. A. Virginica. 

 Plant glandular : bracts many-cleft, shorter than the staminate spike. 



3. A. gracilens. 



1. Acaljrpha ostryaefolia Ridd. Hornbeam Three seeded Mer- 

 cury. (Man. p. 588 ; I. F. /. ^-'97.) N. J. to Kans., Fla. and Mex. — 

 Petinsylvania : Bucks, Morrisville. 



2. Acalypha Virginica L- Virginia Three-seeded Mercury. 

 (Man. p. 588; I. F. f. 22gS.) In woods and thickets, Ont. and Minn., 

 south to Fla. and Tex. — Pennsylvania : NorTh.\mpton ; Bucks ; Dela- 

 ware ; Chester ; Lancaster ; Franklin ; Allegheny. 



3. Acalypha gracilens A. Gray. SLENDER Three-seeded Mercury. 

 (Man. p. 588; I. F.y. -?-?99. ) In dry woods and thickets, R. I. to Kaus., 

 Fla. and Tex. — Pennsylvania : Bucks ; Delaware ; Chester ; Frank. 



LIN. 



5. RICINUS L. 



1. Ricinus commtmis L. Castor-oil Plant. (Man. p. 589 ; I. F./. 

 2J04.) In waste places, N. J. to Fla. and Tex. Nat. of the tropics. — 

 Pennsylvania : Locally escaped from gardens throughout the state. 



6. EUPHORBIA L. 



Glands of the involucre with petal-like appendages. 



Leaves opposite : leaf -blades inequilateral, oblique at the base. 

 Leaf-blades entire : seeds smooth : plants glabrous. i. E. polygonifolia. 

 Leaf -blades toothed : seeds wrinkled : plants more or less pubescent. 

 Plants branched at the base, the branches prostrate. 

 Involucres not split : stems with appressed hairs. 



2. E. niaculata. 

 Involucres split : stems with spreading hairs. 3. E. hirsuia. 



Plants not branched at the base, erect or ascending. 



4. E. nutans. 

 Leaves alternate or scattered on the stem : leaf-blades equilateral. 



Bracts and leaves of the inflorescence small, green : seeds pitted. 



5. E. corollaia. 

 Bracts and leaves of the inflorescence large, white-margined : seeds reticu" 



late-tuberculate. 6. E. marginata. 



Glands of the involucre without petal-like appendages. 

 a. Leaves mainly opposite 



