TRANS. ST. LOUIS ACAD. SCIENCE. 
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1850. A. W. Chapman found in Northern Florida a peculiar 
Isoetes, which proved to be a large-spore form of I. Jlaccida , and 
was named var. Chapmani. 
1853. E. Hall discovered in his fields near Athens in Central 
Illinois the species which was afterwards named by J. Gay I. me- 
LANOPODA. 
1856. I found I. echinospora, var. Braunii, in Lake Winni- 
piseogee in New Hampshire, the type of I. Braunii, Durieu. 
1857. E. D. Eaton obtained /. Engelmanni for the first time 
in the New England States. 
i860. Wm. Boott found near Boston the form of I. echino - 
spora , which was named from his specimens I. muricata by 
Prof. Durieu, the present I. echinospora var. muricata . 
1862. Th. C. Porter discovered near Lancaster, Pa., the largest 
American Isoetes, I. Engelmanni , var. valida. 
In the same year G. Vasey found I. melanopoda in Iowa. 
1863. ) I. Macoun obtained /. echinospora , var. Braunii , in 
West Canada. 
In the same year W^m. M. Canby discovered in Maryland I. 
SACCHARATA. 
1865. Leidy and Porter collected I. lacustris near the outlet 
of Lake Superior. 
In the same year 7 . Tuckermani was rediscovered near Bos¬ 
ton by Wm. Boott. 
1866. Chs. Wright discovered I. Cubana in Eastern Cuba. 
In the same year H. Bolander found two new species in the 
Sierra Nevada of California, I. Bolanderi and I. pygm^a. 
1867. Wm. Boott got near Boston the species named after him 
I. Boottii, now known as /. echinospora , var. Boottii. 
1869, Wm. M. Canby discovered on the Stone Mountain in 
Georgia the curious little I. melanospora. 
In the same year S. Watson found /. echinosfora , var. Brau - 
niiy in Utah. 
1871. E. Hall gathered beautiful specimens of /. Nut tallit 
on the Columbia river. 
1872. The same traced I. melanopoda to Texas. 
1873. T. P. James got I. echinospora,\?iX . Braunii, in Nova 
Scotia and C. C. Parry found /* Bolanderi in Yellowstone lake 
in Wyoming. 
Missouri 
Botanical 
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