142 American Midland Naturalist Monograph No. 7 



57. Grossulariaceae Dumort. — Gooseberry Family 



1. Ribes L. — Gooseberry. Currant 



{Grossularia Mill.) 



1. Branches usually with spines or prickles. 



2. Ovary and fruit setose; calyx-lobes shorter than the tube; woods 

 and river banks, local. Apr-May. Pasture Gooseberry. [R. 



gracile Michx.] R. cynosbati L. 



2. Ovaiy and fruit smooth; calyx-lobes equalling or exceeding the 

 tube. 

 3. Stamens exserted; flowers greenish-white; spines 5-15 mm 

 long; woods and river banks, nearly throughout 111. Apr.- 

 May. The common gooseberry in 111. ...R. missouriense Nutt. 

 3. Stamens included: flowers green or purplish; spines 3-8 mm 

 long; swamps and bogs, n. 111. May-June. Wild Goose- 

 berry R. hirtellum Michx. 



1 . Branches not at all spiny or prickly. 



4. Leaves minutely resinous-dotted and more or less pubescent 

 beneath. 

 5. Flowers yellowish, glabrous, 8-10 mm long; bracts longer than 

 the pedicels; thickets and moist woods, chiefly n. 111., but 

 extending southward to Coles, Christian, and Pike counties. 

 May-June. American Black Currant. [R. floridum L'Her.] 

 R. americanum Mill. 



5. Flowers greenish or purplish, 5-6 mm long; bracts shorter 



than the pedicels; occasionally cultivated, but rarely per- 

 sisting; Lake Co., H. E. Aides in 1952. Black Currant 



R. nigrum L. 



4. Leaves not resinous-dotted ; shrubs escaped from cult. 



6. Flowers greenish; calyx saucer-shaped; fruit red; rarely per- 



sisting around old dwellings; native of Eur. Garden Cur- 

 rant. [R. rubrum sensu auth., non L.] 



R. sativum (Reichenb.) Syme 



6. Flowers yellow ; calyx tubular ; fruit black ; cultivated ground 

 and roadsides, occasional; native of central U.S. BufTalo 



Currant. \R. aurcum sensu auth., non Piu'sh] 



R. odoratum Wendl. 



58. Hamamelidaceae Lindl. — Witch-hazel Family 



1. Leaves palmately veined and lobed; flowers apetalous 1. Liquidambar 



L Leaves pinnately veined, wavy-toothed; petals linear, yellow 2. Hamamelis 



1. Liquidambar L. — Sweet-gum 



L. styraciflua L. Swampy woods; s. 111., extending northward to 

 Jersey, Jasper, and Crawford counties. Apr. -May. 



2. Hamamelis L. — Witch-hazel 



H. virginiana L. Woods, local; n. 111., extending southward to 

 McDonough, Wabash, and White counties. Oct. 



