178 
Agrimonia pubescens Wallr., downy agrimony, soft agrimony, 
A. riehliota Wall: woodland agrimony, p. 844 
AMELANCHIER, shadbush, service berry 
Amelanchier arborea (Michaux f.) Fern., shadbush, service berry, 
sarviss berry, sarviss tree, June berry, shadblow, sugar 
plum, p. 800 
+A. humilis Wieg., low shadbush, low service berry, p. 800 
ARONIA, chokeberry 
[S: PYRUS] (Hardin, 1973; Voss, 1985b) 
Aronia melanocarpa (Michaux) Elliott, black chokeberry [S: Pyrus 
melanocarpa (Michaux) Willd.] (Hardin, 1973; Voss, 
1985b), p. 800 
ARUNCUS, goat’s beard 
Aruncus dioicus (Walter) Fern., goat’s beard, p- 795 
var. pubescens (Rydb.) Fern. [M: A. dioicus] (the validity of 
this variety has not been examined critically; see 
Robertson, 1974) 
CRATAEGUS, hawthorn 
— that there is widespread disagreement on the number of 
recognizable species in this large and difficult genus; various 
(1965) as to nomenclature, although that work may have provided 
fi i or changes; discussion in this genus attributed to 
treatment authored by E. J. Palmer, while the 
was contributed by R. L. McGregor.) 
tions 
S: refers to the 
treatment in G: 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
