66 KEY TO THE SPECIES 



2. MACROCALYX 



Low spreading annuals with tender, somewhat hirsute herbage ; alternate pin- 

 nately parted leaves, and a- small white corolla in a star-shaped gradually enlar- 

 ging calyx. 



1. Macrocalyx Nyctelea (L.) Kuntze (Nyctelea). Peduncles 1-flowered, 

 opposite the leaves ; calyx-lobes lanceolate, about equaling the corolla, in fruit 

 10-12 mm. long ; capsule globose, pendulous, 



3. PHACELIA (Phacelia) 

 Biennials or perennials, with hirsute, hispid or glandular pubescence, alternate 

 leaves, flowers in dense, 1-sided, recurved orspicate cymes, and reticulate or pitted 

 seed-coat. 



1. Phacelia leucopliylla Torr. (Silky Phacelia). Perennial, more or less 

 tufted, densely silky-pubescent, the several or numerous stems ascending ; leaves 

 oblong or lanceolate, mostly entire, the lower long-petioled ; flowers sessile, in 

 dense scorpioid cymes ; calyx-lobes hispid, shorter than the 5-lobed bluish corolla; 

 corolla-tube with 10 vertical lamina or folds (in pairs) between the filaments. Fre- 

 quent on shale slopes and in the mountains. 



2. Phacelia sericea (Graham) Gray (Wyoming Phacelia). Perennial, seri- 

 ceous-silky, with a close pubescence ; stems usually several, 2-3 dm. high; leaves 

 pinnately parted into narrow oblong divisions ; inflorescence of several short 

 spikes in a close terminal naked thyrsus ; corolla violet-blue or whitish ; stamens 

 long-exserted ; style 2-cleft at apex. Stony ravines. 



LVII. BORAGINACEyE (Borage Family) 



Mostly rough hairy herbs with alternate entire leaves, 5- 

 parted calyx, regular 5-lobed. sympetalous corolla, 5- stamens on 

 the corolla-tube, a deeply 4-lobed superior ovary, becoming 

 4 seed-like nutlets with the style arising from the center. 



* Nutlets attached to the style hy more or less of their ventral face or angle ; 

 throat of corolla-tuhe with 5 crests or folds. 



1. r.appula. Pubescent ; flowers blue or white, with short tube ; nutlets 

 armed with barbed prickles. 



2. Oreocarya. Rough hirsute or hispid ; flowers white (in the species given) 

 with short tube ; nutlets unarmed. 



3. Mertensia. Smooth or nearly so ; flowers blue ; corolla tubular-funnel- 

 form or trumpet-shaped ; mature nutlets wrinkled. 



* * Nutlets attached by their base, smooth and bony when mature ; throat 

 crested. 



4. Uthospermum. Strigose pubescent ; flowers yellow, corolla salver-form 

 or trumpet-shaped. 



1. LAPPULA (Stickseed. Beggar-lice) 



Pubescent or hispid-canescent annuals or perennials with narrow alternate 

 leaves, deeply 5-cleft calyx, salver-form corolla with 5-spreading lobes and its 

 throat closed by the 5 crests, the margins or backs of the nutlets armed with 

 barbed prickles and the sides often papillose. 



