866 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



Key to the genera 



1. Corolla regular; anthers and filaments distinct; capsule opening by lateral 



pores formed by the uplifting of small lids: Subfamily Campanuloi- 



deae (2). 



2. Flowers terminal or axillary, on long pedicels; corolla campanulate, relatively 



deep; plants perennial 1. Campanula. 



2. Flowers axillary, sessile; corolla rotate, relatively shallow; plants annual. 



2. Specularia. 

 1. Corolla irregular, usually strongly so; filaments united into a tube; anthers 

 distinct or united; capsule opening apically, by valves or somewhat 

 irregularly: subfamily Lobelioideae (3). 



3. Anthers distinct, all alike; flowers minute, 5 mm. long or less; leaves in a basal 



rosette; plants of deserts and semi deserts, annual 3. Nemacladus. 



3. Anthers united into a tube, 3 of them longer than the other 2; flowers 10 



mm. long or more; leaves mostly cauline; plants of moist situations (4). 



4. Corolla tube slit down one side nearly to the base 4. Lobelia. 



4. Corolla tube entire, not slit down one side 5. Porterella. 



1. CAMPANULA. Bellflower 



Plants glabrous or nearly so; upper leaves linear or linear-lanceolate, 

 the basal and lower leaves oblanceolate, spatulate, or ovate, petiolate, 

 sometimes cordate; flowers blue or violet, showy; hypanthium tur- 

 binate-obconic ; ovary and capsule trilocular. 



Several species of this very attractive genus are cultivated as 

 ornamentals. 



Key to the species 



1. Calyx lobes entire; mature capsule nodding, the valves at the very base. 



1. C. ROTUNDIFOLIA. 



1. Calyx lobes normally with 1 or more callose teeth on each side; mature capsule 

 erect, the valves distinctly above the middle, usually two-thirds to three- 

 fourths of the distance from base to apex 2. C. parryi. 



1. Campanula rotundifolia L., Sp. PL 163. 1753. 



White Mountains (Apache and Greenlee Counties), Pinaleno 

 Mountains (Graham County), 9,000 feet or higher, meadows and 

 rocky slopes, June to September. Boreal regions of North America 

 and Eurasia, south in western North America, in the mountains, to 

 Coahuila, eastern Arizona, and northern California. 



Harebell, bluebell. An exceedingly widespread and variable species. 

 Numerous segregates have been proposed, but at the present time the 

 most conservative course appears to be to regard them all as phases 

 of one polymorphic species. 



2. Campanula parryi A. Gray, Syn. Fl. ed. 2, 2 l : 395. 1886. 

 Kaibab Plateau, San Francisco Peaks, near Flagstaff, Clark Valley 



(Coconino County), 7,000 to 10,000 feet, mountain meadows, July to 

 September. Wyoming and central Utah to northern New Mexico 

 and northern Arizona. 



2. SPECULARIA. Venus-lookingglass 



Plants somewhat hairy; leaves ovate to oblong or suborbicular, 

 sessile or clasping; flowers dimorphic, the earlier ones small and 

 cleistogamous, the later flowers petaliferous, showy, purple or violet; 

 hypanthium short-cylindric or elliptic; ovary and capsule regularly 

 trilocular, or sometimes bilocular. 



