PI or a of the Palouse Region 173 



the bud: calyx with an obovate or inversely pyramidal tube much 

 shorter than the foliaceous lobes, these broadly ovate, sharply 

 toothed, vein)-, 3-4 in the earlier, 5 in the later flowers: corolla 

 short-campanulate, 5-lobed: stamens and style as in Campanula: 

 capsule 3-celled, 3-angled, bursting on the side; seeds numerous. 



H. rariflorum Nutt. Annual, the slender stems simple or branched be- 

 low, 8-20 cm. high, sparsely hairy: leaves ovate or orbicular, sessile and 

 partly clasping, coarsely dentate, somewhat scabrous-ciliate, 3-10 mm. long: 

 earlier flowers without corolla, the later ones with blue corollas, barely ex- 

 ceeding the calyx: calyx 5-8 mm. long, more or less hispid, the ovate acum- 

 inate usually toothed lobes a little longer that the tube. Rare in moist 

 places. 



290. CAMPANULA. 



Chiefly perennial herbs: flowers all alike, showy: calyx-lobes 

 narrow: corolla campauulate or nearly so, 5-lobed or cleft: stamens 

 5; filaments dilated at base: capsule short, 3-5-eelled, opening on 

 the side or near the base by 3-5 small uplifted valves, leaving 

 round perforations: many-seeded. 



C. rotundifolia L- Perennial, glabrous, erect, branched at the very base, 

 10-40 cm. high: basal and lower leaves broadly ovate or orbicular, cordate, 

 dentate or entire, petioled; cauline linear, the lower somewhat spatulate, 

 acute, sessile, 2-7 cm. long: flowers solitary or racemose, erect, pedicels slen- 

 der, nodding in the fruit: calyx-lobes subulate, longer than the tube, one- 

 half or one-third as long as the corolla: corolla campauulate, blue, 12-20 

 mm. long: capsule openings near the base. Dry woods, Thatuna Hills. 



Familv 76. LOBELIACEAE. 



Herbs, mostly with milky juices, leaves alternate, simple: flow- 

 ers perfect, scattered or in racemes: calyx-tube adherent to the 

 whole or the lower half of the ovary: corolla gamopetalous, irreg- 

 ular, 5-lobed: stamens 5, free from the corolla, united into a tube 

 commonl}' by their filaments and alwa} r s by their anthers: style 1; 

 stigma often fringed: ovary 2-celled with axile, or 1 -celled with 

 parietal placentae: fruit a many-seeded capsule; endosperm fleshy. 



291. DOWNINGIA. 



Low and spreading glabrous annuals, rather succulent and ten- 

 der: leaves sessile, narrow, entire, the upper reduced to bracts: 

 flowers axillary, sessile: calyx-tube adherent to the ovary, very 

 long and slender, 3-sided, usually twisted: corolla 2-lipped, with a 

 very short tube: filaments and anthers both united into a tube: 

 capsule long and slender, early becoming 1 -celled. 



D. elegans Torr. Stems erect, simple or branched near the base, 10-30 

 cm. high, glabrous throughout or very minutely puberulent: leaves sessile, 



