105. CONVOLVULAGEAE 189 



open woods and along roads, common. May- Aug. Downy 

 Phlox [P. ariiillacea Clute & Ferris] P. pilosa L. 



5. Upper leaves lanceolate or elliptical; stem decumbent at base, 

 bearing sterile leafy shoots; moist woods, common. Apr.- 



June. Woodland Phlox P. divaricata L. 



1. Stem difTuse. much-branched, 10-20 cm long; corolla-lobes bifid; 



calyx-lobes somewhat longer than the tube; plants puberulent; 



sandy soil, not uncommon. Apr. -June. Sand Phlox [P. stellaria 



sensu auth., non A.Gray] P. bifida Beck 



2. Collomia Nutt. 

 C. linearis Nutt. Dry sandy soil, locally in the northern half of 111.; 

 adv. from the West. May-Aug. 



3. Gilia Ruiz & Pavon 

 G. rubra (L.) Heller. Standing Cypress. Escaped from gardens in 

 a few places; native of southern U.S. Jime-Aug. 



4. Polemonium L. 



P. reptans L. Thickets and open woods, locally throughout 111. 

 May-June. 



105. Convolvulaceae Vent. — Morning-glory Family 



1. Plants with chlorophyll and normal leaves, not parasitic. 



2. Styles 2-cleft 1. Stylisma 



1. Style nndi\ided. 



3. Corolla funnelfoi-ni to campanulate; stamens and style included. 



4. Stigmas 2, linear to fusiform; calyx with a pair of subtending sepal- 

 like bracts (these in one species some distance below the calyx) 



2. Convolvulus 



4. Stigma 1, capitate; calyx not subtended by a pair of sepal-like bracts 



3. Ipomoea 



3. Corolla salverform, scarlet; stamens and styles exserted 4. Quanwclit 



1. Plants leafless, parasitic, twining; corolla small 5. Cuscuta 



1. Stylisma Rat. 

 S. pattersoni (Fern. & Schubert) G.N.Jones. Sandy prairie, rare; 

 Oquawka, Henderson Co., Aug. 10. 1873. H. N. Patterson; V. H. 

 Chase in 1934. [Breweria pickeringii of auth., not (Torr.) A.Gray; 

 Bonarriia pickeringii of auth., not (Torr.) A.Gray]. 



2. Convolvulus L. — Bindweed 

 1. Corolla 3-5 cm long; calyx closely subtended and enclosed by two 

 large bracts. 



2. Plants erect, ascending, or decumbent, finely pubescent; petioles 



about one-quarter the length of the blades; dry .sandy or 

 rocky soil, local; s. to St. Clair and Wabash coimties. June- 



Aug. Dwarf Bindweed C. spithamaeus L. 



2. Plants twining or trailing; petioles longer. 



