230 American Midland Naturalist Monograph No. 7 



6. Diervilla Mill. — Bush Honeysuckle 

 D. lonicera Mill. Rocky woods, n. 111., extending southward to 

 La Salle and Kankakee counties; an isolated station along Sangamon 

 R. in Piatt Co. May-June. [D. trifida Moench]. 



7. Triosteum L. — Horse-gentian 

 1. Principal leaves usually with broadly dilated connate-perfoliate 

 bases; corolla purplish or dull red, 12-15 mm long; sepals 

 finely and evenly pubescent; stem softly short-pubescent, the 



hairs 0.5 mm long; woods and thickets. May-June 



- T. perjoliatum L. 



1. Principal leaves narrowed to the sessile bases. 



2. Leaves ovate or oval; sepals finely and evenly pubescent; fruit 

 8-15 mm in diameter; corolla purplish-red. 

 3. Stem glandular-puberulent and hirsute; sandy soil in open 

 woods; n. and centr. 111., extending southw. to Macoupin 

 and Fayette counties. May-June T. aurantiacum Bickn. 



3. Stem rather sparsely hirsute with somewhat reflexed non- 



glandular hairs 1-2 mm long; rich woods, local. May- 

 June T. illinocnse (Wieg.) Rydb. 



2. Leaves lanceolate or oblanceolate; stem hirsute, not glandular; 



sepals ciliate, otherwise glabrous; corolla greenish-yellow; 



fruit 6-7 mm in diameter; alluvial soil, s. 111., not common. 



May T. angustijolium L. 



121. Campanulaceae Juss. — Bellflower Family 

 1. Leaves petioled or tapering at the base; flowers in a terminal inflorescence 



1. Campanula 



1. Leaves sessile, clasping, cordate; flowers axillary, solitary, sessile 



2. Specularia 



1. Campanula L. — Bellflower 

 1. Flowers in spikes or racemes. 



2. Corolla rotate; style declined; capsule clavate, with apical 

 pores; moist woods, common throughout 111. June-Sept. 

 [Cayyipanulastrum americanum (L.) Small; Campanula il- 

 linoensis Fresen.] C. amcricana L. 



2. Corolla campanulate; style straight; capsule globose, opening 



by basal pores; roadsides and waste places; escaped from 



cult.; introd. from Eur. June-Sept C. rapunculoides L. 



1. Flower in a loose panicle, or solitary; corolla campanulate. 



3. Corolla 5-12 mm long; leaves all linear or narrowly lanceo- 



late; plants of wet ground. 



4. Leaves linear; corolla blue, 8-12 mm long; marshy ground, 



wet meadows, and lake shores in n. 111., south, to Mason 



Co. July-Aug C. uliginosa Rydb. 



4. Leaves lanceolate; corolla white, 5-8 mm long; wet meadows, 

 local; chiefly in the northern half of the state, extending 

 southw. to Cass Co. June- July C. aparinoidcs Pursh 



