APPENDIX. 561 



1. Hairs on st. and pan.-rach. dense and fairly long, usually 

 patent. L. mostly 5-nate. 



. Sep. normally reflexed, though often partially patent 

 (or even erect) in fr. 



R.fuseus Wh. & N. Prk. rather short, somewhat scattered. 

 Lts. coarsely toothed, softly hairy beneath ; term, rather broad 

 with long point. Pan. narrow, cylindrical, with sunken stkd. 

 gl. and acic. 



Var. nutans Rogers. Prk. usually more unequal. Lts. more 

 deeply incised, with very attenuate point. Pan. very lax, sub- 

 racemose above, drooping. Fr.-sep. usually erect at first. 

 (This var. -would hardly be out of place in Section 2.) 



Var. macrostachys (P. J. Muell.). Prk. longer. Lts. whitish- 

 felted beneath. P*an. conspicuously pyramidal, with divaricate 

 branches and blackish-purple villous rach. Stam. comparatively 

 short. 



b. Fr.-sep. mostly erect. 



Subsp. obscurus Kalt. Chief prk. hooked or nearly so. 

 Prklets acic. and stkd. gl. mostly very small. Lts. even-toothed. 

 Pan. long, with deep red pet. and short stain. 



2. Hairs on st. abundant, rather short, loose or partly ap- 

 pressed. L. 5-nate or 3-4-nate. Sep. erect or patent on 

 unripe fr., often reflexed ultimately. 



a. L. mostly 5-nate. 



JR. pallidm Wh. & N. Prk. usually confined to angles, 

 mostly subequal. Lts. thin, very irregularly toothed, long and 

 rather narrow. Pan. straggling-pyramidal, with wavy rach. 

 slender ped. and mostly short blackish stkd. gl. 



Var. nov. leptopetalus. St. most densely clothed with very 

 short acic. and stkd. gl. Lts. with somewhat glaucous tint 

 and sharply incised teeth. Pan. normally broad, with inter- 

 lacing branches. Pet small, very narrow. 



b. L. 3-4-nate, rarely 5-nate. 



R. scaber Wh. & N. St. roundish, glaucous, rough with 

 minute acic. Prk. small. Lts. with fine teeth and rather 

 short point. Pan. narrow, with short hair and mostly short 

 stkd. gl. 



JR. thyrsiger Bab. Hairs on et. partly appressed. Lts. 

 coarsely irregularly toothed, obtusangular-obovate. Pan. long, 

 subracemose, with long-pedicelled fl. 



3. Hairs on et. rather thinly scattered or nearly absent. L. 

 mainly 3-nate. 



a. Sep. clasping young fr., mostly reflexed ultimately. 

 JR. Lintoni Focke. St. usually subglabrous. Prk. very 



