558 
APPENDIX I. 
Pan. very lax and glandular, slightly armed, much narrowed 
above. Somewhat intermediate between B. Drejeri and 
R. Leyanus. 
{R. podophyllus P. J. Muell.) See Group IX.., Radula. 
Group IX. Radul^. St. rough with crowded short sub- 
equal acic. and stkd. gl. Large prk. subequal (usually equal 
in typical R. radida) and nearly confined to angles. Inter- 
mediate prk. absent. While thus strictly limited the members 
of this group can hardly be confused with those of ^any other. 
As in the three succeeding groups, all the pan. -branches except 
the lowest are usually cymose or umbellate-racemose and not 
simply racemose. Stkd. gl. and acic. on pan. unequal, mostly 
short. 
1. Stkd. gl. on pan.-rach. and ped. mostly sunken in the 
patent hairs ; well-marked acic. usually few or none. Stkd. gl. 
and acicular organs on st. crowded. 
a. L. v/ith ashy or greenish-gTey felt beneath. 
R. radida Weihe. Prk. rather few, very strong, all on the 
angles, about equal. Faces of st. with very short subequal 
mixed armature. Term. It. broadly ovate-acuminate . Pan. 
pyramidal, with strong prk. 
Subsp. anglicarms Rogers. Prk. weaker, many, more 
scattered, only subequal. General armature showing rather 
more range of variation. Term. It. narrow, obovate or oval, 
finely toothed. Pan. cylindrical, with weak prk. 
Subsp. echinatoides Rogers. St. glabrous. Prk. rather more 
variable, occasionally hooked. Lts. all obovate, with com- 
pound incised teeth, often greener and only hairj' beneath. 
Pan. much like that of R. radula. 
Subsp. sertiflorus j\Iuell & Lefv. 1 Prk. chiefly short, often 
hooked. Lts. uniformly narrow, somewhat cuneate, with 
shallow teeth, soon greenish beneath. Pan. rather narrow, 
with hooked prk. and small fl. 
R. echinatus Lindl. Prk. strong, nearly equal. Lts. thick, 
incised-lobate, all greyish-felted beneath. Pan. very narrow, 
with large fl. strongly reflexed sep. and declining prk. 
R. rudis Wh. & N. St. glabrous. Prk. many, short. 
Glands very abundant, sessile and shortly stalked. L. large. 
Pan. diffuse, with many slender-pedicelled small fl. 
b. L. normally green and rather thinly hairy beneath (in 
vars. JVewbouldii and Bloxamianus sometimes thinly felted). 
R. oigocladus Muell & Lefv. ? St. bluntly angled, dark, 
glaucous, thinly hairy. Term. It. obovate-cuspidate, much 
narrowed towards base. 
