36 Spring Flora of Ohio. 



Ur-mus a-mer-i-ca'-na L. White Elm: American Elm.— Buds and 

 branchlets glabrous ; leaves 2-4 in. long, soft pubescent beneath or 

 soon glabrous ; floivers in close fascicles. 



ur-mus ra-ce-mo'-sa Thomas. Rock Elm : Cork Elm.— Bud scales 

 downy ciliate, these and the young branchlets somewhat pubescent ; 

 branches often with corky ridges ; leaves as in the last or the veins 

 more simple and straight ; floivers racenied. 



2. Genus CEL'-TIS. — Calyx 5 to 6-parted, persistent; fruit a globu- 

 lar drupe ; leaves 3-nerved at base and somewhat oblique ; bark of 

 trunk ridged, the furrows discontinuous. 



CelMis oc-ci-den-ta'-lis L. Hackberry; Sugarberry: Nettleberry. — Leaves 

 reticulated, ovate or ovate-lanceolate, sharply serrate. 



XVI. Order MO-RA'-CE-ZE. MULBERRY FAMILY. — Flowers race- 

 mose, spicate or capitate ; calj'x becoming flesh}' in fruit ; trees or 

 large shrubs, with milky juice. 



Leaves serrate, sometimes lobed, ?)-iier\-ed Moius. 1 



Leaves entire, shining, feather-veined Toxylon. 2 



1. Genus MO'-RUS. — Flowers in catkin-like spikes, calyx of the 

 fertile spikes succulent, making a jitic}-, berry-like, oblong fruit; trees. 



Mo'r-us ru^-bra L. Red Mulberry. — Leaves rough above, downy 

 beneath, those of the young shoots often lobed ; fruit dark-purple. 



Mo'-rus al'-ba L. White Mulberry. — Leaves smooth and shining, 

 sometimes lobed; fruit whitish. Occasionalh- adventive. 



2. Genus TOX'-Y-LON. {Madura) — Staminate flowers in loose 

 short racemes, the pistillate in dense globose heads ; trees (or tall 

 shrubs) with milky juice and entire shining leaves. 



Tox'-y-lon po-mif'-er-um Raf [Madura aiirantiaca Nutt.) Osage 

 Orange. — Cultivated for hedges, rarely escaped. 



XVIL Order LO-RAN-THA'-CE-/E. MISTLETOE FAMILY. — Shrubby 

 plants with coriaceous, greenish foliage ; parasitic on trees ; fruit a 

 globose berry. 



