Bahia absinthifolia Benth.

*

Valle do Agatita is a broad Interior drainage basin located
at ca. 103 long, and between 26 and 27° lat. It is bounded
to the east by Sierra del Sobaco and Sierra de los Organos „
to the «rest by Sierra de Tlahualilo and to the north by
Sierra del Rey. The soil is a fine powdery sil)e often encrusted
with salts. The vegetation is dominated by an open stand
of Larrea tridentata. At wide intervals, or clustered in
depressed areas are Prosopis glandulosa trees. On the coarser
soil of bajada areas, the vegetation is more diverse, with
Agave lecheguilla, Jatropha dlolaa. Eupho-abia antjaiphllitlGa.
gottouiaria splendens. Serlcodes greggil. Opuntla. bradtlana.
Opuntla xeotooaulis abd other species. On the western
side of the valley is a broad playa, nearly devoid BSXX of
vegetation.

number from this population

I IL

til

1973

> State University
THE OHIO STATE UNIVERSITY

LANTS OF MEXICO
tate of Coahuila

olia Benth. var dealbata
. Gray) A.Gray
(Compositae)

NEW YORK BOTANICAL GARDEN

Bolsón de Mapiml: Valle de Acatita. 8.9
mile N of Rancho Acatita. Larrea flats
with Opuntia leptocaulis. Ray and disc
both yellow. Abundant in sandy soil.

BOTANICA!

Garden

David Keil
Lyle A. McGill

No. 8703A

22 August 1971

01900442