BORAGINACEAE. 285 



Nutlets obliquely attached ; flowers mostly bractless ; corolla blue or white 



with funnelform throat. 8. MERTENSIA. 



Nutlets attached by the very base. 



Corolla salverform or funnelform ; its lobes rounded and spreading. 

 Racemes not bracted ; corolla in ours blue ; its lobes convolute in bud. 



9. MYOSOTIS. 

 Racemes bracted ; corolla yellow or yellowish ; its lobes imbricated in 



bud. 10. LlTHOSPERMUM. 



Corolla tubular ; its lobes erect, acute, otherwise as in Lithospermum. 



ii. ONOSMODIUM. 



i. LAPPULA Moench. STICK-SEED. 



Inflorescence leafy-bracted only at the base ; bracts minute above ; gymnobase 

 short-pyramidal ; scar of the nutlets ovate or triangular ; perennials or 

 biennials. 



Corolla 1.5-6 mm. wide, blue; stem very leafy. 

 Marginal prickles free to the base or nearly so. 



Corolla 1.5-3 mm. wide. i. L. Besseyi. 



Corolla 46 mm. wide (leaves firmer). 2. L. floribunda. 



Marginal prickles united for Y3~ l /2 their length into a distinct wing. 



Stem-leaves linear-lanceolate, densely strigose. 3. L. angustata. 



Stem-leaves oblong-lanceolate, hispidulous ; the hairs with papillose bases. 



4. L. scaberrima. 

 Corolla 6-8 mm. wide, blue with white center ; stem very leafy at the base. 



5. L. gradient a. 

 Inflorescence leafy; the floral leaves, although smaller, resembling those of the 



stem ; annuals. 

 The annular margin connecting the bases of the prickles inconspicuous in all 



four nutlets. 

 Calyx-lobes more than twice as long as the fruit, reflexed-spreading ; floral 



leaves broadly lanceolate. 6. L. calycosa. 



Calyx-lobes less than twice as long as the fruit ; floral leaves linear or linear- 

 lanceolate. 7. L. occidentalis. 

 The annular margin connecting the bases of the prickles at least in three of 



the nutlets broadened and forming a cup. 

 Plant diffusely branched, at flowering time without basal rosette. 



8. L. cupulata. 



Plant at flowering time with a basal rosette of spatulate leaves; stems 

 more simple. 9. L. collina. 



1. Lappula Besseyi Rydb. In wooded canons of Colorado. Alt. about 

 8000 ft. Mouth of Cheyenne' Canon near Pike's Peak. 



2. Lappula floribunda (Lehm.) Greene. (Echinospermum floribundum 

 Lehm.) On hillsides and among bushes from Man. and Alb. to N. M. and 

 Calif. Alt. 5000-10,000 ft. Boulder Canon; New Castle; Twin Lakes; 

 La Veta; Gunnison; Valley Spur; Pagosa Springs; near Dix Post Office; 

 Wahatoya Creek; mountains, Larimer Co.; Four-mile Hill, Routt Co.; North 

 Poudre ; Empire ; Poudre Canon ; Como. 



3. Lappula angustata Rydb. Foot-hills of Colo, and Wyo. Alt. 5000-6000 

 ft. La Veta; foot-hills and plains near Boulder; Rist Canon; Hahn's Peak. 



4. Lappula scaberrima Piper. In sandy soil from Wyo. and Neb. to Colo. 

 Cripple Creek; Idaho Springs. 



5. Lappula gracilenta Eastw. In canons of southwestern Colo. Navajo 

 Canon; Mesa Verde. 



6. Lappula calycosa Rydb. In waste places and fields in Colo. Alt. 5000- 

 6000 ft Pike's Peak; Mancos; New Windsor, Weld Co.; Walsenburg; 

 Glenwood Springs; Ft. Collins. 



