252 ASCIvEPIADACEAE 



Terr., N. C. and Kans. — Pennsylvania: Pike; Lackawanna; Mon- 

 roe ; Northampton ; Bdcks ; Delaware ; Chester ; Lancaster ; 

 Huntingdon ; Erie ; Ai,i,egheny. 



12. Aaclepias vertlcillata L. Whori<Ed Mii,kweEd. (Man. p. 744 ; 

 I. F. f. 2^20.) Dry fields and hills, Me. and Ont. "to the N. W. Terr., 

 Fla., Mex. and N. Mex. — Pennsylvania : LuzERNE ; Northampton ; 

 Delaware ; Chester ; Lancaster ; Franki,in ; Huntingdon ; 

 Ci,arion ; Armstrong. 



2. ACERATES Ell. 



1. Acerates virldiflora (Raf.) Eaton. GREEN Mii^kwEEd. (Man. p. 

 746; I. F. /. 2924.) In dry, sandy or rocky soil, Mass. to Ont., N. W. 

 Terr., Fla. and Tex. — Pennsylvania: Northampton; Dei,aware; 

 Chester ; Lancaster ; Frankwn ; Westmorei<and ; Huntingdon ; 

 Ai,i,eghany ; Montgomery. 



3. CYNANCHTJM L. 



1. Cynancbum nigrum (L.) Pers. Bi,ack Sw allow- worT. (Man. 

 p. 747 ; I. F. f. 2930. ) In waste places, escaped, Mass. to Pa. and Ohio. 

 — Pennsylvania : Philadelphia, Bartram's Garden ; Delaware. 



4. VINCBTOXICUM Walt. 

 1. Vincetoztcum obliquum (Jacq. ) Britton. LarGE-ELOWERED 

 VinceToxicum. (Man. p. 748 ; I. F. /. 2934. ) In thickets, Pa. to 

 Ohio, Va. and Ky. — Pennsylvania: Philadelphia ; Delaware ; Ches- 

 ter ; Montgomery ; Lancaster ; Franklin. 



5. PERIPLOCA L. 

 1. Fetiploca Graeca L. (Man. p. 1050.) Nat. of Syria and the 

 Grecian Islands. Adv. or nat. in N. Am. — Pennsylvania : Philadel- 

 phia. 



Orders. POLEMONIALES. 



A. Stamens 5. 

 a. Fruit capsular or baccate : ovary not 4-lobed. 

 Styles or stigmas distinct. 

 Ovary 1-2-celled, or rarely 4-celled : stigmas 2. 

 Ovary 2-celled or 4-celled. 

 Corolla unappendaged within : plants with typical leaves. 



Fam. I. ■CONVOLVULACEAE. 



Corolla appendaged within : parasitic twining plants with scale-like 

 leaves. Fam. 2. Cuscutaceae. 



Ovary i-celled. Fam. 3. Hydrophyllaceae. 



Ovary 3-celled : stigmas 3. 

 Calyx-lobes imbricated : corolla mostly plaited in the bud. 



Fam. I. CONVOLVULACEAE. 



Calyx-lobes valvate : corolla merely convolute in the bud. 



Fam. 4. POLEMONIACEAE. 

 Styles or stigmas wholly united. 

 Median axis of the gynoecium in the same axis as the stem ; seeds 



mostly pitted. Fam. 9. Solanaceae. 



Median axis of the gynoecium not in the same axis as the stem : seeds 

 mostly tuberculate. Fam. 10. Scrophulariaceae . 



