24. Caryophvllageae 85 



kakee, St. Clair, and Will counties. May-June. [A. patida f. 

 media Steyenn.] A. patula Michx. 



7. Holosteum L. — Jagged Chickweed 

 H. ufubcllatuni L. Roadsides, fields, and waste places; nat. from 

 Eur. Apr.-May. 



8. Agrostemma L. — Clorn Cockle 



A. githago L. An occasional weed in fields and waste ground; nat. 

 from Eur. May-Jidy. The seeds are poisonous. 



9. Silene L. — Catchfly 

 1 . Leaves opposite, not whorled. 



2. Calyx ovoid or clavate, not becoming inflated in fruit or con- 

 stricted at the mouth. 

 3. Stems glabrous or nearly so, or the upper internodes glutinous. 

 4. Flowers 12-17 mm in diameter in flat-topped cymes; calyx 

 clavate, 1-1.5 cm long; leaves ovate-lanceolate; waste 

 places; ad\-. from Eur. June-July. Sweet William 

 Catchfly ^S". arnieria L. 



4. Flowers 3-4 mm in diameter, paniculate; calyx ovoid, 5-8 



mm long: upper leaves linear to lanceolate; roadsides 

 and fields, not uncommon. May-July. Sleepy Catchfly 



S. antirrhina L. 



3. Stem pubeiiilent. 



5. Petals white or pink. 



6. Calyx 12-16 mm long; roadsides and fields, rare; adv. 



from Eur. June- July. Forked Catchfly 



S. dichotoma Ehrh. 



6. Calyx 15-25 mm long; cultivated ground or roadsides; 



adv. from Eur. June-July. Night-flowering Catchfly 



S. nocti flora L. 



5. Petals crimson or scarlet; calyx 15-25 mm long. 



7. Leaves ovate-lanceolate; petals mostly undixided; road- 



sides and prairie soil, s. 111., rare. July-Aug. Royal 



Catchfly S. regia Sims 



7. Leaves spatulate or oblanceolate; petals 2-cleft; woods, 



local. May-July. Firepink S. virginica L. 



2. Calyx inflated in fruit, more or less constricted at the mouth. 

 8. Flowers in loose, terminal panicles; plants glaucous. 



9. Calyx campanulate, 12-16 mm long, conspicuously veiny, 

 roimded at base; seeds 1.2-1.5 mm long; fields or road- 

 sides, occasional; nat. from Eur. May-July. Bladder 



Catchfly S. cucubalus Wibel 



9. Calyx ellipsoid, 10-12 mm long, not conspicuously veined, 

 tapering at base; seeds 0.8-1 mm long; roadsides and 

 waste places, occasional; nat. from Eurasia. June-Aug. 

 S. cserei Baumg. 



