196 
(Bumelia lanuginosa, continued) 
appears to vary continuously in the subspecies; 
accordingly we have not recognized varieties within this 
subspecies) 
B. lycioides (L.) Pers., southern buckthorn, Carolina buckthorn, 
ironwood, p. 1174 
SAURURACEAE, lizard’s tail family 
SAURURUS, lizard’s tail 
Saururus cernuus L., p. 488 
SAXIFRAGACEAE, saxifrage family 
(see also GROSSULARIACEAE, HYDRANGEACEAE) 
HEUCHERA, alum root 
Heuchera americana L., p. 780 
*var. americana (Wells, 1984 
var. hirsuticaulis (Wheelock) C. Rosend., Butters & Lakela [S: 
incl. var. interior C. Rosend., Butters & Lakela; G: H. 
hirsuticaulis (Wheelock) Rydb.] (Wells, 1984) 
H. parviflora Bartling, p. 779 
var. parviflora [S: H. missouriensis C. Rosend.; M: H. parviflora 
var. rugelii (Shuttlew. ex Kunze) C. Rosend., Butters, 
& Lakela] (Wells, 1984) 
var. puberula (Mackenzie & Bush) E. Wells [S: H. puberula 
Mackenzie & Bush, incl. f. Slabrata Steyerm.] (Wells, 
H. richardsonii R. Br. [S: H. richardsonii var. affinis C. Rosend., 
Butters & Lakela, var. §rayana C. Rosend., Butters & 
Lakela; G: incl. var. §rayana, var. hispidior C. Rosend., 
Butters & Lakela; M: H. richardsonii var. grayana] 
(Wells, 1984), p. 780 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
