BORAGE FAMILY 197 



Inflorescence, at least in fruit, open, with elongate branches. 



Corolla 15-18 mm. long; calyx enlarging and becoming 15-18 



mm. long in fruit. 32. O. longiflora. 



Corolla 12-15 mm. long; calyx scarcely enlarging, in fruit less 

 than 1 cm. long. 33. O. Wetherillii. 



Inflorescence narrow; stem slender. 

 Basal leaves spatulate. 



Corolla 12-14 mm. long, much exceeding the calyx. 



34. O. cristata. 

 Corolla slightly exceeding the calyx. 22. O. echinoides. 

 Basal leaves linear-oblanceolate ; corolla slightly exceeding the 

 calyx. 35. O. tenuis. 



Nutlets finely muricate; at least the inflorescence with yellowish hairs. 

 Plant low, 1-2 dm. high; basal leaves 2-3 cm. long, 3-7 mm. wide. 

 CoroUa about 1 cm. long, piu-e white; nutlets muricate on the back. 



36. O. fulvocanescens. 

 Corolla 12-15 mm. long, often with a yellow eye; nutlets roughly papil- 

 lose. 38. O. flavoculata. 



Plant 2-3 dm. liigh; basal leaves 4-10 cm. long, 7-15 mm. wide. 



37. O. nitida. 

 Nutlets smooth. 



Fruit not depressed ; stem-leaves linear or linear-lanceolate. 



Stem-leaves linear; nutlets brownish, obtuse, slightly ridged on the back. 



39. O. ftava. 

 Stem-leaves Unear-lanceolate ; nutlets ivory-white, acute, flat on the back. 



40. O. leucophaca. 

 Fruit depressed, acutely margined. 41. O. alaia. 



Corolla yellow, or «-ith a yellow throat. 



Basal leaves spatulate or oblanceolate; corolla usually white with yellow throat; 



nutlets papillose. 38. O. flavoculata. 



Basal leaves narrowly linear-oblanceolate; corolla yellow; nutlets smooth. 



39. O. flava. 



11. ALLOCARYA Greene. 



Racemes loose and leafy-bracted ; corolla small, less than 2 mm. wide; nutlets more or 

 less rugose. 

 Plant glabrous or nearly so. 1. A. orthocarpa. 



Plant decidedly hairy. 



Plant liirsute. 2. A. hispidula. 



Plant strigose. 



Calyx erect in fruit. 



Bracts oblong, scarcely more than twice as long as the flowers; nutlets 



uncinate-bristly on the back. 3. A. Nelsonii. 



Bracts (often lacking under some of the flowers) linear and resembling the 

 leaves; nutlets merely rugose on the back. 4. .4. scopulorum. 



Calyx spreading in fruit; nutlets irregularly wrinkled on the back. 



5. A. cognata. 

 Racemes bractless; flowers 7-8 mm. broad; nutlets not rugose. 6. A. Hendersoni. 



12. CRYPTANTHA Lehm. 



Nutlets not winged. 



Nutlets all or some of them tuberculate or muricate. 



Nutlets usually solitary. I. Recurv.\tae. 



Nutlets usually 4. 



Nutlets dissimilar, 3 of them tubercled or muricate, the fourth smooth or 



nearly so. II- Heteroc.\RY.\e. 



Nutlets all alike and tubercled. III. Muricul.\t.\e. 



Nutlets all smooth. 



Groove of the nutlets simple, continuous to the base. IV. Leiocarpae. 



Groove two-forked at the base. 



No open areola between the forks of the groove; nutlets acute. 



V. TORREYAN.\E. 



A distinct open areala between the forks of the groove; nutlets lanceolate, 

 acuminate. VI. R.\mulosissimae. 



Nutlets winged. VII. Pterocaryae. 



I. RECURV.'VTAE. 



Calyx-lobes recurved. 1. C. recurvata. 



Calyx-lobes not recurved. 5. C. barbigera. 



II. Heterocaryae. 



Sepals in fruit strongly tliickened on the back. 2. C. crassisepala. 

 Sepals in fruit not strongly tliickened on the back. 



Plant 1-2 dm. high; calvx in fruit 6-8 mm. long. 3. C. Kelseyana. 



Plant a few cm. high; calyx in fruit less than 5 mm. long. 4. C. minima. 



III. ]Muricul.\t.\e. 

 Pubescence of the stem at least in part consisting of spreading hairs. 



Leaves broadly hnear or oblanceolate; calyx in fruit over 5 mm. long. 



Calyx densely pubescent with long wliite silky hairs and bristly on the midribs; 



nutlets tubercled even on the ventral side; groove open. 5. C. barbigera. 

 Calyx with appre.ssed or ascending yellowish hairs, and with spreading bristles 

 on the veins. 

 Nutlets smooth on the ventral side; groove closed. 6. C. multicaulis. 



