4. Wolffiella Hegelm. Engler's Bot. Jahrb. 21: 303. 1895
Description
This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
4. Wolffiella Hegelm. Engler's Bot. Jahrb. 21: 303. 1895
Thallus thin, unsymmetrical, rootless, curved in the form of a segment of a band, punctate on both surfaces with numerous brown pigment-cells. Pouch opening as a cleft in the basal margin of the thallus, a stipe attached to its margins. Flowers and fruit unknown. [Diminutive of Wolffia.]
About 7 species, mostly of tropical regions. Besides the following, 2 others are known from western North America. Type species: Wolffiella oblonga (Phil.) Hegelm.
1. Wolffiella Floridana (J. D. Smith) Thompson. Florida Wolffiella
Fig. 1130
Wolffia gladiata var. floridana J. D. Smith, Bull. Torr. Club 7: 64.
1880. Wolffia floridana J. D. Smith; Hegelm. Engler's Bot. Jahrb. 21:
305. 1895.
Wolffiella floridana Thompson, Ann. Rep. Mo. Bot. Card. 9: 17-
1897.
Thalli solitary, or commonly coherent for several generations forming densely interwoven masses, strap-shaped, scythe-shaped, or doubly curved, tapering from the rounded oblique base to a long-attenuate apex, 21/2"-5" long, 14-21 times as long as wide; basal portion of the long stipe persistent, the pouch elongated-triangular, or the upper angle rounded.
Georgia and Florida to Missouri, Arkansas and Texas.
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