Engelmann, George undated descriptions [1] (seq. 9)

Leptochloa fascicularis also on sandy banks
of Mississippi.
Eragrostis n.sp. which I sent to you
Arundinaria macrosperma lower Ohio & Wabash
Paspalum fluitans
Panicum sanguinale, glabo & filif. I believe
I have remarked before on the
distinct characteristics.
{Panicum} dichotomum — The large flowering form
({Panicum} pubescens, etc.) and the small flowers and
awns. ({Panicum} nitidem etc.) seem to be distinct,
but not the smooth and pubescent ones.
Cenchrus tribuloides, common on the
sandy banks of the Mississippi
Tripsacum dactyloides rare in fertile
Praries.
Andropogon virginicus
—————
The plants our our Lead region
in the south eastern part of the state
(Bumelia, Oenothera missourensis
Psorale esculenta, Leaves within
Lithospermum tenellum — and others
may be looked for in South western
Illinois

Continuation of St. Louis Plants
Cyperus tenuior n.sp. annuus, culmo acute
triangulari laevi, foliis culmo sub brevioribus
planis, margine dorsoque scabris; foliis
involucri 13 exterioribus longissimis,
radiis divaricato-ramosis; spiculis
spicato-captatis; filiformibus subteretibus
7-9 floris; rachi squamis interioribus
linearibus adnatis alata fragili,
squamis exterioribus remotis adpressis
obtusis, dorso herbaceis 5-nerviis, margine
stylo ad medium 3 fido; achenio lineari
triquetro apiculato basi paulo
attenuato breviter stipitato squamas
interiores aequante exterioribus paulo
breviore.

Banks of a muddy creek in the
Mississippi bottom opposite St. Louis together
with {Cyperus} michauxeanus, {Cyperus} erythrorhizos
Jussiaea repens; sometimes together with
the latter floating among driftwood. fl. Septemb.
— From 4 inches to 2 feet high; leaves in
the larger specimens 4 l. wide; spikelets
mostly brown, 6 l. long, thinner than in any
distant so that the apex of the lower scale
never touches the base of the upper one.
Nuts about 7/8 of one line long. — The annual
growth, the fragile spike, the distant inner
scales which embrace the nut show
an alliance with {Cyperus} michauxianus, from
which however it is readily distinguished

Leptochloa fascicularis also on sandy banks
of Mississippi.
Eragrostis n.sp. which I sent to you
Arundinaria macrosperma lower Ohio & Wabash
Paspalum fluitans
Panicum sanguinale, glabo & filif. I believe
I have remarked before on the
distinct characteristics.
{Panicum} dichotomum — The large flowering form
({Panicum} pubescens, etc.) and the small flowers and
awns. ({Panicum} nitidem etc.) seem to be distinct,
but not the smooth and pubescent ones.
Cenchrus tribuloides, common on the
sandy banks of the Mississippi
Tripsacum dactyloides rare in fertile
Praries.
Andropogon virginicus
—————
The plants our our Lead region
in the south eastern part of the state
(Bumelia, Oenothera missourensis
Psorale esculenta, Leaves within
Lithospermum tenellum — and others
may be looked for in South western
Illinois

Continuation of St. Louis Plants
Cyperus tenuior n.sp. annuus, culmo acute
triangulari laevi, foliis culmo sub brevioribus
planis, margine dorsoque scabris; foliis
involucri 13 exterioribus longissimis,
radiis divaricato-ramosis; spiculis
spicato-captatis; filiformibus subteretibus
7-9 floris; rachi squamis interioribus
linearibus adnatis alata fragili,
squamis exterioribus remotis adpressis
obtusis, dorso herbaceis 5-nerviis, margine
stylo ad medium 3 fido; achenio lineari
triquetro apiculato basi paulo
attenuato breviter stipitato squamas
interiores aequante exterioribus paulo
breviore.

Banks of a muddy creek in the
Mississippi bottom opposite St. Louis together
with {Cyperus} michauxeanus, {Cyperus} erythrorhizos
Jussiaea repens; sometimes together with
the latter floating among driftwood. fl. Septemb.
— From 4 inches to 2 feet high; leaves in
the larger specimens 4 l. wide; spikelets
mostly brown, 6 l. long, thinner than in any
distant so that the apex of the lower scale
never touches the base of the upper one.
Nuts about 7/8 of one line long. — The annual
growth, the fragile spike, the distant inner
scales which embrace the nut show
an alliance with {Cyperus} michauxianus, from
which however it is readily distinguished