Jan., 1905.] Key — Hickories in Winter Condition. 
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DESMIDIACE^. 
Desmidium aptogonium (Kuetz) 
Lagerh. 
Hyalotheca dissiliens (Smith) 
Breb. 
Closterium acerosum Ehrenb. 
“ ensis Delph. n. 
“ , lunula (Muell) Nitzsche. 
“ parvulum Nseg. 
“ moniliferum (Bory) 
Ehrenb. 
Closterium liebleinii Kuetz 
Pleurotaenium trabecula (Ehrenb) 
Nseg. 
Cosmarium nitidulum DeNot. 
“ margaretiferum (Turp) 
Menegh. 
“ botrytis(Bory) Menegh. 
“ brebissonii Menegh. 
“ biretum Breb. 
Staurastrum incisum Wolle. n. 
“ leptocladium Nordst. n. 
“ fusiforme Wolle. n. 
KEY TO THE OHIO HICKORIES IN THE WINTER CONDITION 
Louis H. Scholl. 
Hicoria Raf. Large trees with hard, heavy and very tough 
wood; twigs very tough, with alternate leaf scars not 2-ranked, 
without stipular and self-pruning scars; bundle scars scattered, 
sometimes in three areas; terminal bud present, large; bud scales 
usually numerous and imbricate or valvate and few, but at least 
3 exposed, pubescent, sometimes peltate pubescent; axillarv buds 
superposed or apparently single, not clustered at the tip of the 
twig; pith solid and 5-angled; fruit a nut with a husk. 
1. Bud scales valvate, 3-5 exposed, yellow, peltate pubescent; pith 
brown; bark of trunk close and rough; husk of fruit thin, tardily 
and irregularly 4— valved, splitting to below the middle; nut 
smooth, thin shelled, short pointed; seed intensely bitter. 
H. minima (Marsh.) Britt. Bitternut (Hickory). 
1. Bud scales imbricate, more than G, unless shed. 2. 
2. Terminal bud large, 1 inch long; husk of fruit splitting freely to the 
base; nut angled; seed sweet. 3. 
2. Terminal bud small, inch long; husk thin, not splitting freely to 
the base; nut slightly or not angled. 5. 
3. Lower bud scales deciduous ; bark close, rough ; twigs stellate pubescent ; 
husk not separating quite to the base. 
H. alba (L ) Britt. Mockernut (Hickory). 
3. Lower bud scales persistent during the winter; bark shaggy, separating 
in long plates; husk very thick, splitting to the base. 4. 
4. Terminal bud of the globose type, densely pubescent; fruit oblong; 
thick shelled, pointed at both ends. 
H. laciniosa (Mx.) Sarg. Shellbark (Hickory). 
4. Terminal bud of the ovate type, puberulent ; fruit subglobose ; nut thin 
shelled, rounded at the base. 
H. ovata (Mill.) Britt. Shagbark (Hickory). 
5. Bark close; fruit obovoid; nut thick shelled, angled; seed astringent 
and bitter, not edible. H. glabra (Mill.) Britt. Pignut (Hickory). 
5. Bark of old trees separating in strips; fruit nearly globular; nut thin 
shelled, only slightly or not angled; seed sweet. 
H. microcarpa (Nutt.) Britt. Small Pignut (Hickory). 
