A Ss Te re —— ph. FEF ord OF ee ee oe a 
. ROR SP a BAe 
A REVISION OF THE AMERICAN LEMNACEAE. 37 
California (Bolander, 1867; Kellogg and Harford, nos. 946 and 947, 1868- 
69; Jones, no. 2356, 1881; 8. B. and W. F. Parish, no. 1100 in part, 
1881; Cleveland, 1884; Hansen, no. 482, 1893; Thompson, nos. 202, 
205, 208, 1895-96; Henney, nos. 103, 105, 116, 1896). 
Wolffiella Hegelmaier, Engler’s bot. Jahrb. 21°: 303. 
Jan. 1895. 
Stipe attached on the margin of the single reproductive 
pouch. Pouch triangular, opening as a cleft in the basal 
margin of the frond. Fronds rootless, thin, unsymmetri- 
cal, curved in the form of the segment of a band, abun- 
dantly punctate on both surfaces with brown epidermal 
pigment cells. Flowers and fruit unknown. 
* Saber form; stipe insertion at the lower angle of the two walls of 
the pouch. 
Wotrrretia Fiorimana (J. D, Smith). 
Wolfia gladiata var. Floridana J. D. Smith, Bull. 
Torr. Bot. Club. 7: 64. June 1880.— Thompson, Ligulate 
Wolffias of the United States. Rept. Mo. Bot. Gard. 7: 
101-111. pl. 64-66. 26 May 1896. W. Ploridana J. D. 
Smith ex Hegelmaier, Engler’s bot. Jahrb. 21°: 305. 
Jan. 1895. 
Fronds solitary or more commonly long coherent for 
several generations, in time forming densely interwoven 
masses; elongated strap-shaped, doubly curved to falcate 
and band form; tapering from the broad, rounded, oblique 
base to a long attenuated apex, frequently a little con- 
tracted just above the base; .4~-.7 mm. in widest part, by 
5.5-8.5 mm. long, about 14-21 times as long as broad ; 
thin; cavernous throughout except a small portion of the 
apex; only a small area above the base exposed to the air. 
Basal portion of the attenuated stipe persistent, situated 
at the lower right hand angle of the reproductive pouch, 
connecting the two walls. Pouch elongated triangular or 
the upper angle rounded.— Occurring only in the south- 
eastern part of our range.— Plate 4 A. 
17 
