726 BORAGINACEAE 



olla salver-shaped or funnelform, wliite; 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 groove 

 to the p^Tamidal receptacle. Seeds more or less amphitropous, pendulous. 

 [Krynitzkia Fisch. & Mey.] 



Nutlets not winged. 



Nutlets all or some of tbena tuberculate or muricate. 



Nutlets usually solitary. I. Recttrvat.\e. 



Nutlets usually 4. 



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



nearly so. II. Heteroc.vrtae. 



Nutlets all aUke and tubercled. III. IMtjricul.\tae. 



Nutlets all smooth. 



Groove of the nutlets simple, continuous to the base. IV. Leioc.arpae. 



Groove two-forked at the base. 



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



V. Torrey.anae. 

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

 acuminate. VI. R-WIULOSIssimae. 



Nutlets winged. VII. Pteroc.art.ae. 



I. Recurvat.ae. 

 Calyx-lobes recurved. 1. C. recurvata. 



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



II. Heterocartae. 

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



Sepals in fruit not strongly tliickened on the back. 



Plant 1-2 dm. high; calyx 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. Murictjlat.ae. 

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



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



Calyx densely pubescent with long white silky hairs and bri.stly on the midribs: 



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

 Calyx with appressed or ascending yellowish hairs, and with spreading bristles 

 on the veins. 

 Nutlets smooth on the ventral side; groove closed. 0. C. multicaiilis. 



Nutlets narrowly conical with an open narrow groove, finely spini:lose-muri- 

 cate. 7. C. scoparia. 



Leaves narrowly linear; calj-x in fruit about 4 mm. long. 8. C. ambigua. 



Pubescence on the stem appressed; leaves very narrowly linear; caly.x wliite-silky. 



9. C. leptophylla. 



IV. Leiocahpae. 



Mature nutlets solitary, subterete; stem strigose; leaves narrowly linear, almost filiform. 



10. C. flaccida. 

 Mature nutlets tLsually 4, angled on the ventral side; plants more or less hispid; leaves 



linear to oblanceolate. 

 Leaves narrowly linear or linear-lanceolate. 



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



11. C. affinis. 

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



12. C. leiocarpa. 

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



V. Torreyaxa. 



Mature nutlet solitary. 14. C. gracilis. 



Mature nutlets iisually 4. 



Nutlets broadly ovoid, attached by their lower half; fruiting calyx 4-7 mm. long. 

 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. 



16. C. Torreyana. 

 Calyx 6-7 mm. long; lobes much tliickened on the back, usually spreading. 



17. C. calycosa. 

 Nutlets lanceolate in outline, attached by their whole length. 18. C. Watsoni. 



VI. Ramuujsissimae. 

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

 Leaves narrowly linear. 



Branches ascending; flowers not conspicuou.sly unilateral. 20. C. Fendleii. 



Branches divaricate, arcuate, and flowers conspicuously unilateral. 



21. C. ramulosissima. 

 VII. Pterocaryae. 



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



22. C. pterocarya. 

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



23. C. utahensis. 



