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Journal ArticleDOI

Anatomy of the Dicotyledons.

About: This article is published in American Midland Naturalist.The article was published on 1950-11-01. It has received 2511 citations till now.
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TL;DR: In this article, five types of Late Eocene wood from western Nebraska are described: Robinia (Leguminosae), Zelkova (Ulmaceae), and Prunus s.l. (Rosaceae).

20 citations

Journal ArticleDOI
TL;DR: Substantial evidence is provided to support the retention of Nelsonioideae as a subfamily of the Acanthaceae, rather than its transfer to the Scrophulariaceae.

20 citations

Journal ArticleDOI
TL;DR: The most relevant quantitative characteristics diferentiating root wood from stem wood were: vessel elements length and frequency; fibre length, diameter and wall thickness; and ray width and height.
Abstract: Wood from stem and root of L. salviifolia Cham. (Verbenaceae) was studied. Three plants were sampled in a "cerrado" area in Pratânia municipality, Sao Paulo state (23o02'55,5" S e 48o31'26,1" W). Stem samples were collected at breast height (1.30 m from soil), and root samples were collected 30 to 40 cm from the stem base. There were qualitative and quantitative variations between root and stem wood. The most relevant quantitative characteristics diferentiating root wood from stem wood were: vessel elements length and frequency; fibre length, diameter and wall thickness; and ray width and height. Well defined growth increments were observed in root and stem wood. Simple and multiple perforation plates were observed in vessel elements in root and stem wood, however radiate plates were observed only in root wood. Septate fibres and wider rays were observed in root wood.

20 citations

Journal ArticleDOI
TL;DR: A survey of the Tertiary Buxus records suggests two main European lineages evolved from a common stock — a more primitive and extinct one, B. egeriana, replaced during the Middle—Upper Miocene by more advanced small-leaved populations of B. pliocenica Saporta et Marion with a close relationship to the extant B. sempervirens group.

20 citations