334 BORAGINACEAE 



Spikes densely flowered; calyx more or less spreading from rachis, bearing long bristles (some 



exceeding lobes) , deciduous ; plants low, with straight branches.. ..10. C. angustifoUa. 



Calyx % line long, armed with uncinate bristles; cismontane 11. C. micromeres. 



2. Nutlets solitary (rarely 2 in some flowers). 



Calyx in fruit erect or spreading. 



Flowers on pedicels % to 1 line long; spikes Tcry dense, the calyces so densely woolly or 



shaggy-hirsute as almost to conceal the flowers ; s. Shasta Co 12. C. crinita. 



Flowers sessile or subsessile, not concealed by shaggy hairs. 

 Nutlets erect; transmontane deserts and bordering ranges. 



Calyx bristly; corolla % line broad (1 to 2 lines in var.) ; spikes loose 



13. C. decipiens. 

 Calyx densely silky-hirsute, the bristles none or few and short; corolla 1 to 1% lines 



broad; spikes short and dense 14. C. utahensis. 



Nutlets horizontal ; calyx soft -hairy ; spikes loose ; inner North Coast Range in Yolo, 



Lake and Colusa Cos 15. C. excavata. 



Calyx in fruit recurved; Inyo Co 16. C. recurvata. 



II. Nutlets with winged margins or projecttnq sharp margins ; calyx more or less bristly ; 



NUTLETS NORMALLY 4; TRANSMONTANE DESERTS (NO. 22 PARTLY CISMONTANE). 



Spikes with the lower pedicels 1 to 3 lines long; nutlets unequal; stems conspicuously woody at 



base (perennial) ; transmontane deserts 17. C. racemosa. 



Spikes with the flowers sessile or subsessile or the pedicels only % to % line long; stems not woody 

 at base or rarely (annuals). 

 Nutlets with a very narrow or line-like margin ; corolla inconspicuous (% to IY2 lines broad). 

 Nutlets homomorphous, light brown. 



Spikes bracteate toward base ; nutlets minutely papillate on the dorsal side, smooth 



on the ventral side 18. C. costata. 



Spikes bracteate throughout; nutlets minutely papillate on both sides 



19. C. saxorum. 

 Nutlets heteromorphous, white-papillate on a brown ground on both sides ; spikes bract- 

 less or nearly so 20. C. inaequata. 



Nutlets rather broadly or at least obviously wing-margined. 



All 4 nutlets winged, the wing reddish-brown (same color as body), entire; flowers on 



pedicels ^4 or % line long; corolla 1% lines wide 21. C. holoptera. 



All 4 nutlets winged or the fourth nutlet wingless or nearly so ; wing of the nutlet white- 

 chartaceous or light-colored, toothed or erose, the body grayish or slate-color; 

 flowers sessile or subsessile. 

 CoroUa % to V2 line broad; wing of nutlet fimbriate-toothed or crenate, as broad 



as the lanceolate body 22. C. pterocarya. 



Corolla commonly 2 to 3 lines broad; wing of nutlet erose, % to % as broad as the 

 ovate body 23. C. oxygona. 



B. Nutlets smooth. 



I. Hairs on calyx straight or essentially so and eitheb erect, spreading or iiErLEXED. 



1. Ventral groove median. 



a. Hairs on upper part of calyx erect, ascending or spreading. 



Calyces without bristles, resembling woolly tufts, the hairs soft, all alike ; fruiting calyces 1 line 

 long ; spikes bractless, short and dense, borne in 2s to 4s on slender or filiform peduncles ; 



nutlet 1; transmontane deserts 24. C. gracilis. 



Calyces with spreading bristles and also with shorter ascending hairs. 



Style less than half as long as nutlets ; calyx % to 1 line long, vv-ith a tuft of bristles toward 

 base; spikes slender, flexuous or curved; nutlet 1, lanceolate, rostellate or attenuate; 



cismontane, Coast Ranges, Kern Co. and coastal S. Cal 25. C. microstachys. 



Style more than half as long as nutlets. 



Nutlets most commonly lanceolate, acuminate or rostrate, less than half as broad as long. 

 Spikes % to 3 inches long ; Coast Ranges and coastal S. Cal. 



Spikes bractless or with a few bracts near base, mostly % to 1% inches long. 

 Nutlet 1, high-rounded on back and face (circular in cross-section), slender- 

 rostrate ; Lake and Napa Cos 26. C. hispidula. 



Nutlets 1 to 4, low-rounded on back, usually flattish on face, acuminate or 



attenuate ; Coast Ranges and coastal S. Cal 27. C. clevelandii. 



Spikes bracteate, short and dense (% to % inch long) ; nutlets 4 (or 1) ; coast 



line 28. C. leiocarpa. 



Spikes 3 to 5 inches long; Colorado Desert 29. C. ganderi. 



