Alleghanian—Ozark Distriet: Ozark Plateau. - 511 
Tilia americana and Liguidambar styraciflua, Celastrus scandens, Dirca palustris 
are a distributed’). 
ce plants are scarce but there are species of Lemna (L. minor, z Aeanr a: 
dela ® ie Potamogeton (P. Hillii, P. pusillus), Ciao ie (C. um), 
(N. Iuteum), Philotria, Alisma (A. geh Sagi ttaria (S. variabilis, $. Deren ae Pe 
ganium, Zizania in such pools as do occ 
slow-flowing streams with leaves kai in the direction of the current are found Potamo- 
geton en P. hybridus, while the submerged aquatics are two other species of Potamogeton 
with Naias flexilis, Elodea u Ceratophyllum demersum. The muddy shores and low alluvial 
flats er plants w stand in Samen ns such as, Eleocharis acuminata, E. tenuis, 
E. intermedia, E. palustris, E Engelmanni, E. ovata, Cyperus flavescens, €. diandrus, C. acumin- 
atus, Carex Frankii, Eragrostis ee Ernte ee J. acuminatus, J. scirpoideus, Heter- 
anthera, Ranunculus septentrionalis, R. abortivus, Ludwigia, Nasturtium, Cardamine pennsylvanica, 
se Begr=2 Eclipta. 
nd Formation. Here and there on the Missouri Plateau according to Hus) 
see Ze footnote a the deciduous forest formation is interrupted by small ponds formed by the 
obstruction of the underground drainage of the limestone sinks. The hydrophytic flora of such 
ponds consists of Heteranthera limosa, Pontederia cordata, Sagittaria variabilis (in the shallower 
pools), Jussiaea repens, Lemna perpusilla, Wolffia punctata "rhile large quantities of Riccia natans 
so occur. The surrounding vegetation consists x; grasses and sedges. 
ı. Deciduous Forest Formations. 
The forests of Missouri may be divided into two types, viz: the upland 
and lowland forests. 
Upland Forest Formation. The upland forest includes, as most common 
representatives in the northern and central portions of the state, a considerable 
variety of oaks, hickories, the black walnut. This forest type in southern Mis- 
souri is much richer in species than the forests situated back from the streams 
in the northern portion of the state, The disposition of the trees is governed 
by soil and exposure — Ouercus alba is found on the ridges in the southeast 
and gives stamp to nearly all the wooded uplands throughout the middle and 
northern portion of the state. Occupying a considerable territory west of the 
region of pine and white oak, there is found the black jack-scrub oak 
associations. The deciduous forest in the vicinity of Columbia, Missouri, 
according to DANIELS°) consists typically of the Oak Facies. Here occur 
QOnercus alba adapted to a wide range of soils associated with the bur oak 
Quercus macrocarpa on the heavier soils in swamps and along streams, ©. 
platanoides, Q. palustris, O.rubra, Q. terana (= 0. Schneckii), ©. acuminata, 
O. tinctoria, Ulmus, Juglans nigra, Carya alba, C. sulcata, C. tomentosa, C. 
porcina, C. amara (Hicoria ovata, H.laciniosa, H.alba, H.glabra, H. minima), 
Celtis, Gleditschia, Gymnocladus, Acer FRTEEER and nigrum, Aesculus glabra, 
Diospyros, Fraxinus. 
ı) La MAncE, LorRA S.: Rambling Notes from the Ozarks. Garden and Forest V: 525. 
2) This paper of 130 pages with valuable PRJTOgSOgTRpENE and phenologie data was received 
too late to incorporate all of its important results in this volume of "Die Vegetation der Erde”. It 
should be consulted by all students of the flora of the Mississippi Valley 
3) The Flora of Columbia Missouri and Vicinity. University of aloe Studies I No. 2. 
