192 
Hedyotis purpurea (L.) Torrey & A. Gray, mountain houstonia, 
broad-leaved bluets [S: Houstonia purpurea L.] 
(Shinners, 1949; Lewis, 1961), p. 1400 
var. calycosa (A. Gray) Fosb. [S: Houstonia purpurea var. 
calycosa A. Gray] (Terrell, 1959; Lewis, 1961) 
purpurea 
H. uniflora (L.) Lam. [S: Oldenlandia uniflora L.] (Fosberg, 1954; 
Lewis, 1961), p. 1404 
HOUSTONIA (see HEDYOTIS) 
MITCHELLA, partridge berry 
Mitchella repens L., partridge berry, twin berry, p. 1396 
f. repens 
OLDENLANDIA (see HEDYOTIS) 
SHER A RDIA 
¢Sherardia arvensis L., field madder, p. 1388 
SPERMACOCE, buttonweed 
Spermacoce glabra Michaux, smooth buttonweed, p. 1395 
RUTACEAE, citrus family 
PTELEA, hop tree 
Ptelea trifoliata L., common hop tree, Stinking ash, p. 968 
Ssp. trifoliata 
var. mollis Torrey & A. Gray 
var. trifoliata 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
