Dicotyls or Exogenous Plants. 39 



Si-le'-ne car-o-li-ni-a'-na Walt. [S. pennsylvanica Mx.) Wild Pink. — 

 Stems low (4-8 in.); petals wedge-form, slightly notched and eroded, 

 pink. 



Si-le'-ne vir-gin'-i-ca L. Fire Pinic Catch Fly. — Stems slender, 1-2 ft. 

 high; petals oblong, 2-cleft, deep crimson. 



2. Genus AL-SI'-NE. [Stellaria.) — Sepals 4-5, petals 4—"), stamens 

 8, 10, or fewer, styles o, rarely 4 or o. 



A. Stems spreading, flaccid, -ivit/i i or 2 pubescent lines. 



Al-sl'-ne me'-di-a L,. [Stellaria media Sm.) Common Chickweed. — 

 I/Ower leaves on hairy petioles; petals shorter than the calyx, stamens 

 3-10. 



Al-si'-ne pu'-be-ra Mx. Great Chickweed. — Leaves all sessile; petals 

 longer than the calyx, stamens 10. 



A. Stems erect or spreading, luholly glabrous. 



(b. Petals 2-parted, equalling or surpassing the caly.v, bracts scaly^j 



Al-si'-ne lon-gi-fo'-li-a (Muhl.) Britt. (Stellaria longifolia Muhl.) 

 Long-leaved Stitchwort. — Leaves linear, acutish at both ends, spreading; 

 the slender pedicels spreading; seeds smooth. 



Al-si'-ne lon'-gi-pes (Goldie) Coville. (Stellaria longipes Goldie.) 

 Long-stalked Chickweed. — Leaves ascending, lanceolate or linear-lan- 

 ceolate, broadest at the base ; the long pedicels strictly erect, seeds 

 smooth. 



Al-si'-ne gra-min'-e-a (L.) Britt. (Stellaria graininea L.) European 

 Chickweed. — Resembling the last, but the leaves linear-lanceolate, 

 broadest above the base ; the pedicels wddely spreading; seeds strongly 

 rugose. 



(b. Petals 2-parted, small or none, bracts foliaceotis. 



Al-si'-ne bo-re-a'-lis (Bigel.) Britt. (Stellaria borealis Bigel.) North- 

 ern Chickweed. — Leaves broadly lanceolate to ovate-oblong. Reported 

 for Northern Ohio. 



3. Gxenus CE-RAS'-TI-UM.— Sepals 5, rarely 4, petals 2-lobed or 

 cleft, styles equal to the number of sepals; pod usually elongated, 

 opening at the apex by as many teeth as there are styles. 



A. Leaves ovate or obovate or oblong-spatulate. 



