13. Pai'averaceae 65 



7. Petals 18-25 nitii lonsj: huds erect, ovoid; capsules ovoid, acute 



at each end, bristly-hirsute 5. Stylophorum 



7. Petals 8-13 mm long; buds nodding, obovoid; capsules linear, 



glabrous 6. Chelidonium 



6. Flowers red or pink; juice milky; capsules globose or pyriform, 

 opening by 4-20 tooth-like lids under the margin of the discoid 

 stigma 7. Papaver 



1. Macleaya R.Br. — Plume Poppy 

 M. cordata (W'illd.) R.Br. Introd. from e. Asia; cull, and rarely 

 persistent; has been collected in Cook and Henry counties. 



2. Sanguinaria L. — Bloodroot 

 S. canadensis L. Woods, common. Mar.-Apr. 



3. Argemone L. — Prickly Poppy 

 1. Flowers sessile; petals orange, yellow, or creamy; sparingly escaped 

 from gardens to roadsides and waste places; Henderson and 



Mason counties. Jime-Sept. Mexican Poppy A. mexicana L. 



1. Flowers pedimculate; petals white. 



2. Peduncles leafy; adv. from w. U.S.; Lawrence. Morgan, and 



Whiteside counties. June-Sept A. intermedia Sweet 



2. Peduncles leafless; adv. in 111.; cultivated and occasionally spon- 

 taneous. White Prickly Poppy A. alba Lestib. f. 



4. Eschscholtzia Cham. — California Poppy 



E. calif arnica Cham. Cult., and rarely spontaneous; nati\e of Cali- 

 fornia; Kane and Wabash counties. 



5. Stylophorum Nutt. — Celandine Poppy 

 S. diphyllum (Michx.) Nutt. Woods, not common; s. 111. Apr.- 

 June. 



6. Chelidonium L. — Celandine 

 C. rnajus L. C)cca.sionally found in waste places, roadsides, and 

 woods, usually near towns; nat. from Eiu". May-Aug. 



7. Papaver L. — Poppy 

 1. Plants glaucous, glabrous; leaves lobed, clasping the stem; capsules 

 globose; waste places; introd. from Eur. June-Aug. Opium 



Poppy P. somniferiun L. 



1. Plants hirsute, not glaucous; leaves pinnate, tapering to the peii- 

 oled base; capsules obovoid, tiubinate, or clavate. 

 2. Capsules obovoid or turbinate; waste places; introd. from Eur. 



May-July. Corn Poppy P. rlweas L. 



2. Capsules clavate; introd. from Eur.; Wabash Co P. dubiiun L. 



