187 
Zizania aquatica L. Sp. PI. ii, 991 (1753). 
Swamps, northeast of Whitman, July 31; south of the same, August 3 (No. 1630). 
Andropogon provincialis Lam. Encycl. i, 376 (1783). 
The typical form, with slender, more or less purplish stem and spikes, bluish-green 
leaves, which are generally hairy on the upper surface, just above the ligules, 
slender spikes and twisted and bent awns, which are much longer than the glumes, 
grows nearly without exception ou low, moist soil, This species, Panicum virgatum, 
and Andropogon nutans avenaceus, are the principal hay grasses of Grant County. 
Wet valley northeast of Whitman, July 29 to 31 (No. 1618). 
Andropogon provincialis pycnanthus Hack. in DC. Monogr. Phan. vi, 443 (1889). 
This approaches 4. hallii in its large spikelets and more or less glaucous leaves 
and stem, Northeast of Whitman, in the drier part of the valley, July 81 (No. 1813). 
Andropogon hallii Hack. Sitz. Akad. Wiss. Wien, 89, 127 (1884). 
Some of the forms here referred to this species approach A. provincialis in many 
respécts. Either the two are but one species or else they hybridize frequently, 
as nearly every grade between the two is found, In No. 1596 the size, hairiness, etc., 
of the rachis and spikelets are those of A. hallii, but the awn, that of 4. provincialis. 
On hillsides: Mullen, July 24; Whitman, July 31. 
On a sand hill near Dismal River, June 27, a very low and slender form, with short 
spikes, was collected. This bloomed a month earlier and nearly all the spikelets 
were infested with smut (No. 1449). 
No. 1607 is a form that perhaps deserves a varietal name as well as those below. 
In this the rachis and pedicels are nearly destitute of hairs and the flowering 
glumes of the fertile flower awnless. Sand hills: Forks of Middle Loup, July 27; 
northeast of Whitman, July 31. 
Andropogon hallii flaveolus Hack. Sitz. Akad, Wiss. Wien, 89, 128 (1884). 
Sand hills: Cody’s Lakes, August 7 to 9; Mullen, July 24 (No. 1802). 
Andropogon hallii muticus Hack. DC. Monogr. Phan. vi, 444 (1889). 
This is the most common form on the sand hills: Whitman, July 29 (No. 1595). 
It grades, however, into the other forms of 1. hallii, and these into the forms of 4. 
provincialis, A. hallii is a sand-hill plant, always more or less glaucous, 4. provin- 
cialis grows in the wet valleys. On the hillsides and the dry parts of the valleys 
the intermediate forms are found, 
Andropogon scoparius Mx. Fl. i, 57 (1803). 
Specimens from the sand hills are always tufted, with flat sheath, glancous, and 
with the joints of the spikes more hairy than usual, This is common on the sand 
hills, but regarded as a worthless grass. Cody’s Lakes, August 9; South Dismal 
River, August 14 (No. 1665). 
Andropogon nutans avenaceus (Mx.) Hack. in DC. Monogr. Phan. vi, 530 
(1889); Andropogon avenaceum Mx. F1. i, 58 (1803). 
This is common on the lowlands and is one of the best hay grasses. Grant County, 
August 1, 4, and 10; South Dismal River, August 14 (No. 1688). 
Phalaris arundinacea L. Sp. Pl. i, 55 (1753). 
The specimens collected have usually narrow panicles, and are perhaps of a dis- 
tinct form, Northeast of Whitman, in a wet valley, July 29 (No. 1621), 
Aristida fasciculata Torr. Ann. Lyc, N. Y. i, 154 (1824). 
A low and slender form with very long awns. On a dry hill near Thedford, June 
15 and September & (No. 1300). 
Aristida basiramea Engelm.; Vasey, Bot. Gaz. ix, 76 (1884). 
The specimens in the collection were furnished me by Mr. C. C. Wright. The 
plants were low, with lateral awns8 mm. long. Thedford, date not known (No. 1847), 
