CLASS LYCOPODIOPSIDA, clubmosses 
ISOETACEAE, quillwort family 
ISOETES, quillwort 
Isoetes butleri Engelm., Butler’s quillwort, p. 11 
I. engelmanii A. Braun, Engelmann’s quillwort, p. 10 
var. engelmannii 
I. melanopoda Gay & Durieu, black-footed quillwort, p. 10 
f. melanopoda 
LYCOPODIACEAE, clubmoss family 
HUPERZIA, clubmoss - 
[S, G: LYCOPODIUM] (Qllgaard, 1987) 
Huperzia yes (Michaux) Trev. St. Léon, shining clubmoss, 
Lycopodium lucidulum Michaux] (Qllgaard, 1987), 
o 
var. lucidula 
H. porophila (Lloyd & Underw.) Holub, rock clubmoss [S: 
Lycopodium selago L. var. patens (Beauv.) Desv.; M: 
[S, 
L. porophilum Lloyd & Underwood] (Waterway, 1986; 
Qllgaard, 1987), p 
LYCOPODIUM, clubmoss (see also HUPERZIA) 
Lycopodium dendroideum Michaux, round-branched ground pine 
S: L. obscurum L. var. dendroideum (Michaux) D. 
Eaton] (Hickey, 1977), p. 7 
L. tristachyum Pursh, ground-cedar, p. 8 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
