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APPENDIX I. 
R. longithyrsiger Bab. Prk. short. Lts. with shallow even 
teeth, obovate-cuspidate. Pan. pyramidal, racemose or sub- 
racemose above ; ped. rigid, purplish with short stkd. gl. Carii. 
pubescent-giabrescent. 
Var. hotryeros Rogers. St. conspicuously glaucous. Prk. and 
other arms more unequal. L. rather more frequently 4 — 5-nate. 
Lts. truncate-mucronate, more narrowed towards base. Pan. 
more composite, with larger fl. less rigid ped. and hairy carp. 
b. Fr.-sep. normally reflexed throughout. 
R. foliosus Wh. & N. Prk. many weak subequal. Lts. 
nearly uniform, usually broadest near middle. Pan. long and 
narrow, with flexuous rach. and short few-flowered and often 
fasciculate branches. 
Group XIT. KoEHLERiANi {Hystrices Focke). St. low 
arching or nearly prostrate or climbing, usually indistinctly 
angled, with scattered prk. prklets acic. bristles and stkd. gl. of 
varying form and length. Some prk. very strong and (like all 
the arms) occasionally glandtipped. L. mostly 5-nate. Pan. 
composite, sometimes subracemose above ; lowest branches 
racemose ; middle and often upper cymose or subumbellate, 
3 to many-flowered; rach. and ped. almost as variously armed 
as St. Usually large strong plants, with more unequal and 
varied armature than is found in any other group. Dis- 
tinguished from the Sub-Koehlericmi by the greater range of 
variation in the still more scattered armature, the special 
abundance of strong bristles passing into acic. and the greater 
number and greater length of the glandtipped organs. 
1. Prk. somewhat scattered, but chiefly on angles. Prk. and 
acic. rarely glandtipped. Intermediate arms only fairly many. 
a. Prk. not very unequal, all of moderate length (except 
occasionally in R. hostilis). Stkd. gl. on rach. rarely very 
long. 
R. glareosvs Rogers. St. angular. Prk. rather strong, sul)- 
equal. L.3 — 4 (5) nate-pedate. Lts. narrow obov.-cuneate, with 
compound serration in upper half, hairy on nerves beneath ; 
term, acumin. into long point. Ultra-axillary pan. lax. Sep. 
erect in fr. Pet. very narrow, pale pink. 
R. rosaceus Wh. & N. St. roundish, pubescent or sul^- 
glabrous. Prk. rather short. L. chiefly 3-nate. Lts. broad, 
hairy on nerves beneath ; lat. very gibbous. Pan. broad. Pet. 
bright pink. 
Var. hystrix (Wh. & N.). St. angular, more hairy, with 
stronger more unequal armature. L. often 5-nate. Lts. 
narrow, pubescent beneath. Pan. narrow. Sep. more erect. 
Pet. pink or pinkish. 
Var. infecundus Rogers. Armature nearly Radulan. L. 
