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FIELDIANA

Botany

Published by Field Museum of Natural History

Volume 34, No. 5 October 19, 1971

Note On Gibsoniothamnus

ALWYN H. GENTRY

MISSOURI BOTANICAL GARDEN

ST. Louis, MISSOURI

The species roughly intermediate between the Bignoniaceae and

the Scrophulariaceae continue to cause taxonomic headaches. Wil-

liams has proposed the genus Gibsoniothamnus to encompass several

species of this alliance which had been erroneously treated under

Verbenaceae. He correctly cites his new genus as a further link be-

tween the Scrophulariaceae and the enigmatic genus Schlegelia which

traditionally has been included in the Bignoniaceae. Unfortunately,

however, he overlooked the fact that Gibsoniothamnus pithecobius,

the type species of Gibsoniothamnus, is identical to Schlegelia cornuta

Donn.-Sm., based on a Heyde and Lux collection, number 3044,

from San Miguel Uspantan, Quiche", Guatemala.

Gibsoniothamnus cornutus (Donn.-Sm.) A. Gentry, comb,

nov. Schlegelia cornuta Donn.-Sm. Bot. Gaz. 18: 6. 1893. Cleroden-

dron pithecobium Standl. & Steyerm. Field Mus. Bot. 22: 373. 1940.

Gibsoniothamnus pithecobius L. Wms. Fieldiana, Bot. 32: 214. 1970.

Library of Congress Catalog Card Number: 71-172359

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