284 HYDROLEACEAE. 



II. Phacelia ciliosa Rydb. In the mounlains from Alb. and B. C. to Colo. 

 and Ncv. — Alt. 8000-12,000 ft. — Between Bald Mountain and Seven Lakes; 

 near Pagosa Peak ; Cameron Pass ; Hahn's Peak ; Clear Creek Caiion ; 

 moimtains above Boreas ; Berthoud Pass, near Georgetown ; Little Kate Basin, 

 La Plata Mountains; Carson; Silver Plume. 



5. MARILAUNIDIUM Kuntze. 



I. Marilaunidium angustifolium (A. Gray) Kuntze. (Nama dichotomum 

 aiigitstifolium A. Gray) In cultivated ground and waste places from Colo, 

 to N. M. — Colorado Springs. 



Family 115. HELIOTROPACEAE Small. Heliotrope Family. 



Cone of the stigma penicillatc-setose ; fruit didymous ; each of the two carpels 

 splitting into two almost hemispherical nutlets. i. Euploca. 



Cone of the stigma not penicillate-setose ; fruit in ours 4-lobed, splitting into 

 four i-seeded nutlets. 2. Heliotropium. 



I. EUPLOCA Nutt. 



1. Euploca convolvulacea Nutt. {Heliotropium convohulaceum A. Gray) 

 Sandy plains from Neb. and Wyo. to Tex. and Calif.; also Mex. — Arkansas 

 River; sandy plains of Platte. 



2. HELIOTROPIUM L. Heliotrope. 



I. Heliotropium spathulatum Rydb. (H. Curassavicum Hook.; not L.) In 

 river valleys from Ass. and Wash, to N. M. and Calif. — South of New 

 Windsor, Weld Co. 



Family 116. BORAGINACEAE A. Gray. Borage Family. 



Nutlets with hooked prickles at least on the margin. i. Lappula. 



Nutlets unarmed or if prickly, the prickles not curved. 



Receptacle conic or elongated ; the nutlets attached laterally. 



Nutlets attached below the middle, with an oblique truncate back, which is 

 surrounded by an entire or toothed margin ; low pulvinate-cespitose per- 

 ennials. 2. Ekitkiciiium. 

 Nutlets attached at the middle or with an elongated scar reaching from the 

 base to above the middle, not with a truncate margined back ; plants 

 not pulvinate-cespitose. 

 Pedicels and calyx persistent in fruit. 



Calyx circumscissile ; plants dichotomously branched. 



3. PiPTOCALVX. 



Calyx not circumscissile ; plants not dichotomously branched. 

 Calyx-lobes spreading in fruit ; leaves alternate ; perennials. 



4. OUEOCARYA. 



Calyx nearly closed in fruit ; leaves proper opposite ; annuals. 



5. Allocarya. 

 Pedicels in fruit falling off with the calyx ; the latter closed ; branched 



but not dichotomous annuals. 6. Cryptanthe. 



Receptacle flat or merely convex. 



Scar of the nutlets large and excavated, bordered by a prominent margin. 



7. Anchusa. 

 Scar of the nutlets small and marginless. 



