726 BORAGINACEAE 



VII. PXEROaUtYAE. 



1. C. recurvata* 

 5. C. harbigera. 



olla salver-shaped or funnelform, white; tube short; throat closed by 5 scales 

 (fornices); lobes 5, imbricate. Stamens 5, included; filaments short. Nutlets 

 ovoid, attached for at least the lower half by a narrow, simple or bifurcate ^oove 

 to the pyramidal receptacle. Seeds more or less amphitropous, pendulous. 

 [Krynitzkia Fisch. & Mey.l 



Nutlets not winged. 



Nutlets all or some of thenx tuberculate or muricate. 



Nutlets usuaUy solitary. I. Recurvatae. 



Nutlets usually 4. 



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



nearly so. II. Heteroc.vryae. 



Nutlets aU alike and tubercled. III. IMuricULATAE. 



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. TORREYANAE. 



A distinct open areola between the forks of the groove: nutlets lanceolate, 

 acummate. VI. Ramulostssimae 



Nutlets winged. 



I. Recurvatae. 



Calyx-lobes recurved. 

 Calyx-lobes not recurved. 



II. Heterocakyae. 



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

 Sepals in fruit not strongly thickened on the back. 



Plant 1-2 dm. high; calyx in fruit G-8 mm. long. 3. C Kelmana. 



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



III. MURICIJL.1TAE. 



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



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



Calyx densely pubescent with long wiiite silky hairs and bristly on the mianos, 



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

 Calyx with appressed or ascending yellowish hairs, and with spreadnig bristies 



on the veins. ,. 



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



Nutlets narrowly conical with an open narrow groove, finely spmnlose-mura- 

 cate. 7. C. scopqna. 



Leaves narrowly hnear; calyx in frmt about 4 mm. long. 8. C. arnbigua. 



Pubescence on the stem appressed; leaves very narrowly linear; calyx white-silKy. 



9. C. leptophyUa. 



IV. Leiocarpae. 



Mature nutlets sohtary, subterete; stem strigose; leaves narrowly linear, almost filiform - 



10. C. flaccxda. 

 Mature nutlets xisually 4, angled on the ventral side; plants more or less hispid; lea\es 



linear to oblanceolate. 

 Leaves narrowly hnear or linear-lanceolate. 



Fruiting calyx about 6 mm. long; nutlets attached only to the middle. ^ 



11. C. afflms. 



Fruiting calyx 3-4 mm. long; nutlets attached their whole length. . 



12. C. leiocarpa. 



Leaves wider, oblanceolate or oblong. 13. C confusa, 



V. Torreyana. ^ ... 



Mature nutlet solitary. ' 14. C. gracilis. 



Mattire nutlets usually 4. i o- 



Nutlets broadly ovoid, attached by their lower half; fruitmg calyx 4-7 ^^-J^^^' 

 Corolla-limb .5-6 mm. wide. 15. C. grandiflora. 



Corolla-limb less than 2 mm. wide. 



Calyx 4-5 mm. long; lobes not much thickened on the back. njana 



Calyx 6-7 nun. long; lobes much thickened on the back, usually spreading. 



17. C. calycosa. 



Nutlets lanceolate in outUne, attached by their whole length. 18. C. Watsonu 



VI. Ramulosissimae. 



Leaves spatulate or oblanceolate, or the upper sometimes linear. 19. C. Pattersonu 

 Leaves narrowly linear. 



Branches ascending; flowers not conspicuously unUateral. 20. C. Fendlcn. 



Branches divaricate, arcuate, and flowers conspicuously unUateral. josissima 



VII. Pterocaryae. . 



Fruiting calyx 4-5 mm. long; nutlets broadly ovate, with a broad erose or toothed wing 



22. C. ptcrocarya. 



Fruiting calyx, 2-3 mm. long; nutlets lance-ovate, with a narrow, entire wing- 



23. C. utahensis. 



