12 
(Ruellia humilis, continued) 
var. expansa Fern. [G: R. humilis; M: R. humilis var. longiflora 
(A. Gray) Fern] 
var. frondosa Fern. [G: R. humilis; M: R. humilis var. humilis] 
var. humilis [G: R. humilis] 
f. grisea Fern. [G: R. humilis; M: R. humilis var. humilis] 
f. humilis 
var. longiflora (A. Gray) Fern. [G: R. humilis] 
f. alba (Steyerm.) Steyerm. [M: R. humilis var. humilis] 
f. longiflora 
R. pedunculata Torrey ex A. Gray, wild petunia, p. 1376 
ssp. pedunculata 
R. strepens L., wild petunia, smooth ruellia, limestone ruellia [S, 
M: incl. f. cleistantha (A. Gray) McCoy] (Long and 
Uttal, 1962; Long, 1970), p. 1375 
f. alba Steyerm. [M: R. strepens] (the validity of 
maintaining the white-flowered form has not been 
studied) 
f. strepens 
ACERACEAE, maple family 
ACER, maple 
Acer negundo L., box elder, ash-leaved maple, p. 1018 
var. interius (Britton) Sarg. 
var. negundo 
var. texanum Pax [M: A. negundo] (the infraspecific taxonomy 
of A. negundo is poorly understood and requires 
further study) 
var. violaceum (Kirchner) Jaeger [M: A. negundo] (see note 
under var. texanum) (note that the epithet var. 
violaceum is sometimes credited to a Jon Miller of 
Bristol, who apparently published the name in 1826 
in @ Nursery catalogue; a copy of this publication 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
