BORAGE FAMILY 579 



Lateral angles of nutlets knife-like or merely sharply acute; pedicels stout, very short, less than 1 mm. long. 

 Margins of lateral angles knife-like. 



Nutlets heteromorphic. 3. C. inacquata. 



Nutlets homomorphic. 4. C. costata. 



Margins of lateral angles merely sharply angled. 5. C. angustifolia. 



II. Ptehocaryae. 



Mature nutlets 1 or rarely 2, usually with knife-like lateral angles. 6. C. utahensis. 

 Mature nutlets 4, usually distinctly winged. 



Corolla conspicuous, 4-7 mm. broad; nutlets homomorphic, narrowly winged. 7. C. oxygona. 



Corolla inconspicuous, about 1 mm. broad; nutlets heteromorphic; odd one often wingless, the others 



rather broadly winged. 8. C. pterocarya. 



III. Maritimae. 



Fruiting calyx conspicuously recurved or deflexed, the axial lobe longest and most conspicuously hirsute; 

 nutlets bent. 9. C. rccurvata. 



Fruiting calyx spreading or erect, the abaxial lobe most conspicuously hirsute; nutlets straight. 

 Calyx ascending or spreading, not gibbose at base. 



Nutlets triangular-ovate; calyx minute, subglobose, the lobes barely surpassing the nutlets. 



10. C. tnicrotneres. 



Nutlets oblong-lanceolate; calyx oblong, the lobes distinctly surpassing the nutlets. 



. 11. C. maritima. 



Calyx strictly erect and closely appressed to the rachis, gibbose on the axial side at base. 



12. C. dumetorum. 



IV. Barbigerae. 



Nutlets 1 or rarely 2; style short, half as long as nutlet or less. 



Corolla inconspicuous, less than 1 mm. broad. 13. C. decipiens. 



Corolla conspicuous, 2-3.5 mm. broad. 14. C. corollata. 



Nutlets normally 4; style two-thirds as long to longer than the nutlets. 

 Plants hirsute with spreading hairs. 



Corolla conspicuous, commonly 5 mm. broad but varying from 2-8 mm. in width. 



15. C. intermedia. 



Corolla inconspicuous, 1-2 mm. broad. 16. C. barbigera. 



Plants strigose; corolla inconspicuous, 1-2 mm. broad. 



Nutlets verrucose or verrucose-muricate. 17. C. nevadensts. 



Nutlets spinular-muricate. 18. C. scoparia. 



V. Muricatae, 



A single species. 19. C. muricata. 



VI. Ambiguae. 



Dorsal surface of nutlets more or less roughened. 



Nutlets usually solitary, more or less roughened. 



Nutlets horizontal, bent; pedicels stout, less than 1 mm. long; calyx distinctly bristly on the midrib. 



20. C. excavata. 

 Nutlets erect, straight; calyx-lobes not bristly on the midrib. 



Pedicels slender, 2-3 mm. long; calyx-lobes villous with long white hairs. 



21. C. crinita. 



Pedicels stout, usually less than 1 mm. long; hairs on calyx-lobes straight and ascending, those 

 on the midribs a little longer but not bristly. 22. C. Milobakeri. 



Nutlets 4, erect; pedicels stout, about 1 mm. or less in length. 



Corolla conspicuous, the limb 4-7 mm. broad. 23. C. Hendersonii. 



Corolla inconspicuous, the limb 0.5-2 mm. broad. 

 Flowers in definite spikes. 



Nutlets 2-2.5 mm. long; spikes naked or bracted only at base. 



Stems closely strigose; spikes generally geminate or ternate; calyx-lobes armed on 

 midrib with reflexed or arcuate bristles; nutlets broadly ovate, tessellate-papillate. 



24. C. simulans. 



Stems spreading-hirsute; spikes generally solitary; calyx-lobes armed on midrib with 

 straight spreading tawny bristles; nutlets low-convex on the back. 

 Nutlets grayish, conspicuously echinate on the back. 25. C. echinella. 



Nutlets with low rounded tubercules on the back or nearly smooth toward the base. 



26. C. atnbigua. 



Nutlets minute, 1.5 mm. long; spikes bracted throughout. 27. C. Traskiae. 



Flowers solitary or in glomerules in the axils of the leaves, forming a thyrsus or panicle. 



28. C. Hooveri. 

 Dorsal surface of nutlets smooth, but sometimes faintly tessellate. 



Corolla inconspicuous, limb about 1 mm. wide. 29. C. Torreyana. 



Corolla conspicuous, limb 3-6 mm. wide. 



Plants slender, not stiff, stems slender, erect with slender ascending branches; racemes geminate, 

 bractless; fruiting calyx about 2 mm. long. 

 Corolla-limb 3—4 mm. broad; calyx with the abaxial lobe bearing 1 or more elongated spreading 



bristles; nutlets grayish-mottled with brown. 30. C. incana. 



Corolla-limb 5-6 mm. broad; calyx rather uniformly hispid, the abaxial lobe without elongated 

 spreading bristles; nutlets dark colored, not mottled. 31. C. grandiflora. 



Plants stiff, low and widely branched; spikes mostly solitary, sometimes bracteate below; calyx 

 5-7 mm. long. 32. C. mariposae. 



