114 SELECTED WESTERN FLORA 



1. G. linearis, (Nutt.) Gray. 



Annual, erect, viscid and finely pubescent, leafy, 3-15 in. high; flowers 

 whitish-purple in a leafy head-like cluster. {Collomia linearis, Nutt.) 

 Dry prairies, Man.-Alta. 



3. POLEMONIUM. 



Calyx herbaceous, 5-cleft to about the middle; stamens equally 

 inserted near the base of the corolla; ovules few or several in a cell; 

 seed mucilaginous. Perennial herbs with alternate pinnate leaves, 

 and flowers in a corymb-like cluster. 



P. pulcherrlnum. Hook. 



Stem rather slender, 4-12 in. high, minutely pubescent or glandular and 

 sticky; leaflets 9-21, oblong to lanceolate; flowers on slender pedicels in 

 clusters of small cymes; corolla blue with a white tube. {P. humile, var. 

 pulchellum. Gray.) Rocky Mts. 



LXXII. BORAGINACEiJE (Borage FAmily). 



Rough herbs with entire alternate leaves, and regular symmetrical 

 flowers arranged on one side of the stem which is rolled from the tip 

 and straightens as the flowers open from the bottom upward. Calj^ 

 inferior, 5-parted, persistent; corolla gamopetalous, usually regu- 

 lar, 5-lobed, sometimes with scales on the throat; stamens as many 

 as the corolla lobes and alternate with them, inserted on the tube; 

 ovary of 2 carpels each containing 2 ovules, sometimes the carpels 

 deeply grooved making it appear like 4 carpels. 



1. LAPPULA. Blue Bub. 



Corolla salver-form, the tube closed by scales in the throat; 

 stamens included; nutlets fastened to the base of the style, their 

 backs armed with barbed prickles. Rough weedy annuals or bien- 

 nials with small blue or whitish flowers, and fruit acting as a bur. 



* Racemes without bracts, pedicels keflexed in feuit, calyx-lobes 

 short and reflexed when old. ' 



1. L. deflera, (Wahlenb.) Garcke; var. americana, (Gray) Greene. 



Erect, 1-3 ft. high, pubescent, diffusely branched ; leaves oblong, tapering 

 to both ends; nutlets keeled and roughened on the back, and ^ few prickles 

 along the middle. Waste ground and around thickets, Man.-Alta. 



