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. LiTHOSPERMUM. 



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 

 1 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 4-6 mm. wide (leaves firmer). 2. L. Aoribunda. 



Marginal prickles united for i^-l4 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. gracilenia. 

 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 cations of Colorado. — Alt. about 

 8000 ft. — Mouth of Cheyenne Cafion near Pike's Peak. 



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

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

 Calif. — Alt. 5000-10,000 ft. — Boulder Cafion; 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.Caiion; 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. 



