MISSOURI BOTANICAL GARDEN BULLETIN 167 
Carya microcarpa, small-fruited hickory. 
Bark more or less shaggy, often as rough as in the shagbark 
hickory (Carya alba); fruit subglobose, husk often glossy, splitting 
nearly to the base; nut mostly gray or whitish, angled, rather thin- 
shelled for the group. This is the most variable of all hickories. 
One tree has been found near Allenton and one near Clayton. Dis- 
tribution: Mass. to Mich., south to Va., Ill., and Mo. 
Cornus alternifolia, alternate-leaved dogwood. 
A shrub or small tree 6-18 feet high, with alternate oval or ovate 
leaves; twigs green streaked with white; loose cymes of white 
flowers in May and June followed by deep blue fruit on reddish 
stalks. Abundant near Allenton but nowhere else in our locality. 
Distribution: Quebec to W. Ont., Minn. and Ia., south to Ga. 
and Ala. 
Crataegus, hawthorn. 
Our local flora comprises 38 species of Crataegus, and of these 
24 are strictly confined to this territory, some being represented by 
one or a very few plants. Crataegus Margaretta is found only along 
the upper River des Peres basin. 
Quercus alba X stellata, hybrid oak. 
This tree is growing near Allenton. It has the fruit of the post 
oak (Quercus stellata), and the leaves are a shape intermediate 
between the two parents. Only one tree has been found. 
Quercus lyrata, swamp post oak. 
This species is represented by a very few trees at Allenton, Dis- 
tribution: N. J. to Ind., Mo., Fla., and Tex. 
Ribes Cynosbati, prickly gooseberry. 
Found scattered on the limestone bluffs from Pacific to Allenton. 
It may be distinguished from the more common Ribes gracile by its 
prickly fruit and by the fact that it always grows on bluffs. Distri- 
bution: Me. to Manitoba and south to Mo. 
HERBACEOUS PLANTS 
Agrostis arachnoides, Elliott’s bent-grass. 
Found scattered on the sand hills near Pacific. Distribution: 
S. C. to Ky. and Mo., south to Fla. and Tex. 
Aplectrum hyemale, Adam-and-Eve. 
This interesting orchid is still to be found near Creve Coeur Lake, 
but even there it is very scarce. Distribution: Ont. and Ore., south 
to Ga., Mo., and Cal. 
Arabis lyrata, lyre-leaved rock-cress. 
This low, tufted perennial is rather plentiful on the sand hills ° 
at Batrock, near Pacific, but is found nowhere else in this locality. 
Distribution: Ont. to Va. and Ky., west to Manitoba and Mo., also 
in Japan. 
Aralia nudicaulis, wild sarsaparilla. 
A few colonies are found growing on the sand bluffs near Pacific. 
Distribution: Newfoundland to Ga., Colo., and Idaho. 
