Jones: Flora of Illinois, 130. Convolvulaceae 209 



1. Flowers reddish purple; pedicels pubescent; follicles pubescent, muricate; 

 woods, s. 111., not common. July-Aug. '[Vincetoxicum obhquiim (Jacq.) 

 Britt.; Matelea obliqua (Jacq.) Woodson] G. obliquus (Jacq.) R. Br. 



130. Convolvulaceae Vent. — Morning-glory Family 



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



2. Style 2-cleft; flowers small; leaves narrow, sessile or short-petioled I. Slyl'tsma 



2. Style undivided. 



3. Calyx with a pair of subtending bracts (these in one species some distance 



below the calyx) 2. Convolvulus 



3. Calyx not subtended by a pair of bracts. 



4. Stamens and style exserted ; corolla salverform 3.Quamoclii 



4. Stamens and style included; corolla funnelform or campanulate 4. Ipomoea 



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



1. Stylisma Raf. 



^5". pickeringit (M. A. Curtis) Gray. Sandy prairie, rare; Oquawka, Aug. 

 10, 1873, H. N. Patterson. [Breweria pickeringit (M. A. Curtis) Gray; Bo- 

 namia pickeringit (M. A. Curtis) 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. 

 June-Aug. Dwarf Bindweed C. spithamaeus L. 



2. Plants twining or trailing; petioles longer. 



3. Leaves triangular-hastate or sagittate; flowers single. 

 4. Leaves hastate, the basal lobes angled. 



5. Leaves and stems glabrous or nearly so; peduncles usually longer 

 than the petioles; roadsides, and along fences, common. June- 

 Aug. [C. septum of auth., not L.} American Bindweed 



C. americanus (Sims) Greene 



5. Leaves and stems pubescent; peduncles usually not longer than the 



petioles, more or less wing-angled, often 2 in each axil; local, and 



in similar habitats. June-Aug C. fraterniflorus Mack. 8C Bush 



4. Leaves sagittate, the basal lobes rounded. 



6. Plants glabrous or glabrate; peduncles longer than the petioles; an 



occasional weed in cult, ground and waste places; introd. from 

 Eur. June-Aug. European Bindweed C. sepium L. 



6. Plants copiously soft-pubescent; peduncles usually not exceeding 

 the leaves; waste places, occasional; native of e. and s.e. U.S.; 

 on railroad ballast, Diamond L., Lake Co., Gates in 1907. Trail- 

 ing Bindweed C. repens L. 



3. Leaves narrowly hastate; flowers double, pink; plants pubescent; waste 



places, occasional; native of Asia. Japanese Bindweed 



C. japoniciis Thunb. 



