BOR&AGINACBJE. 



S. A lycopsoides, Lehm. Stiff bristles with pimple-like base: leaf margins often 

 undulate: often branching: very variable. 



6. KEYNTTZKIA, Fischer & Meyer. 

 1. Nutlets ovoid, smooth, shining, a ridge down the back, a groove down the inner 



side, attached to the gynobase one quarter the length 1 



| 2. Nutlets ovoid, somewhat rugose, a ridge down the inner side, fixed by the base of 



the inner angle. Entire plant light green. 



* Mostly diffuse: lower leave* often opposite: corolla 1 or 2 lines broad 2, 3 



4 * Flowers numerous: limb ofcoroUa nearly rotate, S to 5 lines broad: yellow crests in the 



throat conspicuous: lower leaves mostly opposite (except in No. 6) 4, 5, 



| S. Nutlets never rugose; inner angle furrowed from less than half to all the way; back 

 convex; side angles mostly obtuse, never margined: calyx in fruit erect or closed: 

 corolla small, throat naked or the crests not exserted: numerous flowers sessile in 

 scorpioid spikes. 



* Fruiting calyx often falling with the enclosed nutlets, these smooth, shining, acute: sepaU 



narrow, hispid, slender. 



Nutlets solitary, rarely 2, acuminate, fixed below the middle 7, 8, 9 



Nutlets usually all maturing scarcely a line long 10, 11 



Nutlets unequal, one much larger than the others 13 



Nutlets 3-angled-ovoid, papillose, sharply muricate or scabrous, attached nearly or quite 



up to the apex: usually erect and hispid; spikes bractless: calyx pungent-bristly. 



Calyx very villous-hispid, In fruit 3-5 lines long, mid-rib strong 18 



Calyx 3 lines long or less; bristles pungent, whitish or yellowish. 



In fruit double the lengjbh of the nutlets not connivent 14, 15 



In fruit 1 or 2 lines long, more or less connivent over the angular nutlets.. 16, 17, 18 



* * Fruiting calyx deciduous above a persistent basal cup: nutlets ovate-deltoid, S -angled, 



usually very smooth, groove forked. 

 Much branched, with flowers almost from base, hispid , 19 



1. K. lithocarya, Greene. Corolla not surpassing the rusty calyx: spike simple. 



2. K. Calif ornica, Gr. Leaves small, narrow: flowering from near the base. 

 Var. flrubglochidiata, Gr. Succulent: nutlets minute-bristly with barbed hairs. 



3. X. trachycarpa, Gr. More lower leaves opposite: nutlets broader, granulate. 



4. K t Chorisiana, Gr. Some pedicels 2 to 12 lines long: leaves large. 



5. K. Scouleri, Gr. Slender: spikes often branching mostly bractless. 



5. K. mollis, Gr. Perennial stems creeping, soft-hairy. Wet borders of ponds. 



7. X. spar siflora, Greene. Sepals with stiff hooked bristles: nutlet flattened. 



8. K. oxycarya, Gr. Strigulose: leaves linear: calyx in fruit deflexed-bristly at base 



9. X. microstachys, Greene. Smaller, hispidulous: calyx bristles not deflexed. 



10. K. leiocarpa, F. & M. Nutlets attached for nearly the whole length. 



11. X. Torreyana, Gr. Nutlets attached half way up, groove forked. 



