226 American Midland Naturalist Monograph No. 7 



8. Flowers yellow, numerovis, paniculate; leaves linear, revolute- 

 margined, cuspidate, 6-8 in each whorl, becoming deflexed; 

 stem puberulent; waste places and fields, occasional; adv. 



from Eur. June-July. Yellow Bedstraw G. verum L. 



8. Flowers white. 



9. Leaves cuspidate, 5-7 (usually 6) in each whorl. 



10. Stems puberulent or glabrous; plants more or less erect. 

 11. Leaves linear; plants usually 15-30 cm tall; dry 



woods, common. June-July G. concinnum T. & G. 



11. Leaves oblanceolate; plants usually over 30 cm tall; 

 introd. from Eur.; Champaign and Henry counties 

 G. mollugo L. 



10. Leaves narrowly elliptical-oblanceolate, 2.5-4 mm wide, 

 the margins retrorsely scabrellous; stems reclining or 

 trailing, retrorsely scabrous on the angles, 0.5-2 m long; 

 swamps and thickets in n. 111. July-Aug. Rough Bed- 

 straw G. asprellum Michx. 



9. Leaves blunt, linear or linear-spatulate. 



12. Corolla 4-lobed, the lobes acute; leaves mostly in fours; 

 stern erect. 

 13. Leaves spreading or ascending; fruit 3 mm in diam- 

 eter; moist ground, common. May-Jime. [G. 

 tinctorium sensu auth., non L.] G. obtusum Bigel. 



13. Leaves mostly reflexed; fruit 1-1.5 mm in diameter; 



swampy ground, rare; Boone, Lake, and McHenry 



counties. June-July 



G. labradoricum (Wieg.) Wieg. 



12. Corolla 3-lobed, the lobes obtuse; leaves of the main 

 stem mostly in sixes and fives; stems diffuse, slender. 



14. Pedicels smooth, straight, 2-6 mm long; flowers in 



twos and threes; wet ground, n.e. 111., rare. May- 

 Sept. [G. claytoni Michx.] ..G. tinctorium L. 



14. Pedicels scabrous, usually arcuate, 5-10 mm long; 

 flowers solitary; swamps and bogs, rare. July- 

 Aug G. trifidum L. 



120. Caprifoliaceae Vent. — Honeysuckle Family 



1. Plants trailing; leaves roundish or oval, crenate, evergreen; flowers nodding 



in pairs; fruit ovoid, indehiscent, 1-seeded 4. Linnaea 



1. Erect or climbing shrubs, or herbs. 

 2. Shrubs with erect or twining stems. 



3. Leaves pinnate; fruit berry-like, 3- to 5-seeded 1. Sambucus 



3. Leaves simple. 



4. Flowers in compound cymes; fruit a 1-seeded drupe 2. Viburnum 



4. Inflorescence otherwise. 



5. Leaves not serrate ; fruit a berry or drupe. 



6. Flowers regular or nearly so; fruit a berry-like drupe with 2 

 nutlets 3. Symphoricarpos 



