1924] Fassett,—A Study of the Genus Zizania 155 
been grown in the Upsala gardens,' and his colored plate represents 
the small plant, not only in size of plant and width of leaf, but in the 
character of the pistillate lemma, which is plainly shown. Col. Monro, 
in his identification of the grasses in the Linnean herbarium,’ says, 
“I. Z. aquatica, L.! The plant so named is the small state which I 
believe Linnaeus, in his Mant: p. 295, intended to indicate by palus- 
tris, of which form there is also a specimen from Upsal Garden, 
marked ‘ palustris’ by Sm." There can be no doubt, then, that Z. 
palustris is the small narrow-leaved plant. 
The sheet marked *1 aquatica" was in the Linnean herbarium in 
1753? but Linnaeus drew no description from this specimen, nor did 
he quote any locality in addition to those given by Gronovius and 
Sloane. He identified the specimen in his herbarium with the Grono- 
vian plant, apparently after the publication of Z. aquatica. Later 
hesegregated the narrow-leaved plant as Z. palustris, leaving the name 
Z. aquatica for the tall broad-leaved plant of the more southern range, 
which was its original application. 
ZizANIA L. Gen. Pl. ed. 5: 427 (1754). Monoecious grasses, the 
upper part of the inflorescence pistillate, the lower staminate: glumes 
obsolete, represented in the pistillate spikelets by minute cupules 
below the lemmas: pistillate lemma usually long-awned, closely 
embracing the grain, clasping the palea by its inrolled margins, 
scabrous at least on the nerves and awn; staminate lemma and palea 
sub-equal, lemma sometimes short-awned: grain long-cylindrical, 
black: stamens six. Type species Z. aquatica. 
a. Plants without creeping rootstocks: staminate branches 
of the inflorescence invariably lacking pistillate flowers; 
pedicels of the pistillate spikelets coarse and clavate, those 
of the staminate capillary b. 
b. Pistillate lemmas thin and papery, dull, finely striate, 
scabrous over the whole surface;* the aborted spikelets 
e slender and shriveled, less than 1 mm. thick c. 
c. Plant (0.8-) 1.2-3 m. tall: leaves (0.8-) 1-5 cm. broad; 
ligules (0.6-) 1-2 (-2.5) em. long: awn of the pistillate 
lemma (1.5-) 2-7 em. long............ enne Z. aquatica. 
1Schreber, Beschreibung der Gräser, ii. 55 (1772). “In Betrachtung dessen 
würde es vielleicht nützlich sein, dieses Gewüchs, welches in dem kóniglichen fran- 
zosischen Garten zu Trianan schon seit geraumer Zeit cultivirt wird, in dem akademis- 
chen botanischen Garten zu Upsal neuerlich fortgekommen ist, und auch in den 
meisten Gegenden von Teutschland obnfehlbar fortkommen würde, einheimsich zu 
machen. ” 
? Monro, Journ. Linn. Soc. vi. 51 (1862). 
3 Jackson, B. D. Proc. Linn. Soc. London, 124th session, 152 (1912). 
4 This character is best seen with the binocular microscope. 
