Dioecious deciduous shrub or small tree to 6 m. tall, up to 15 cm. in diameter; current stems
hairy; bark brown; wood very light in weight. Leaves alternate, 5-ranked, simple, exstipulate …

1 Prepared for a generic flora of the southeastern United States, a joint project of the Arnold
Arboretum and the Gray Herbarium of Harvard University made possible through the support …

Most of the collecting season of 1919 was spent by the writer in making a botanical
reconnaissance of several of the southern counties of Illinois for the Arnold Arboretum. The …

Erect shrubs [sometimes dwarf or climbing; trees, lianas, rarely herbaceous annuals]; stems
generally with a layer of tough cortical fibers, often with internal phloem. Leaves alternate …

Armed or unarmed trees or shrubs [sometimes scandent or xeromorphic], rarely herbs.
Leaves alternate or more rarely opposite, simple or compound, usually glandular-punctate …

Herbs or shrubs [rarely small trees], with quadrangulate or terete stems. Leaves opposite,
seldom alternate or whorled, simple, entire, exstipulate. Flowers regular or irregular, axillary …

1 Prepared for the Generic Flora of the Southeastern United States, a project of the Arnold
Arboretum currently made possible through the support of the National Science Founda-tion …

1 Prepared for a generic flora of the southeastern United States, a joint project of the Arnold
Arboretum and the Gray Herbarium of Harvard University made possible through the support …

Annual, biennial or perennial herbs [infrequently shrubs to trees; stems sometimes
succulent] with simple and often glandular trichomes; underground stems, rhizomes …

* Prepared for a biologically oriented generic flora of the southeastern United States, a joint
project of the Gray Herbarium and the Arnold Arboretum made possi-ble through the support …