General Notes. 145
TWO GENERA OF ASTERACEAE NEW TO THE UNITED
Among Asteraceae from the southwestern United States recently identi-
fied by the writer are two Mexican species which add two generic as well as
specific names to the United States list. Several extensions of range for
plants of this family south of the Mexican border, and from Baja Cali-
fornia to the mainland of Mexico, may also be placed on record here. All
the specimens mentioned are in the U. S. National Herbarium.
Egletes viscosa (L.) Less. A specimen collected in an estuary near
Brownsville, Texas, 1-5 Aug. 1921, by Roxana S. Ferris and Carl D.
Duncan (No. 3123) is in the National Herbarium. This species is known
from Tamaulipas and Sinaloa southward into Central and South America,
so that its occurrence in extreme southern Texas is not surprising. No
true member of the genus, however, has been recorded from the United
TiTHONiA THTJRBERi A. Gray. The collection of this species in Babo-
quivari Canyon, Papago Indian Reservation, Arizona, about 25 miles
north of the Mexican border, by Dr. T. H. Kearney (No. 411), on 11 Oct.
1925, affords what seems to be the first record for any species of the
genus in the United States. Tithonia thurberi was included by Dr. Gray
in the Synoptical Flora more than forty years ago, but only on the strength
of its occurrence at Magdalena, Sonora, some 50 miles south of the United
States border. The species has previously been known from only two
collections, one Dr. Gray's type, collected by George Thurber at Mag-
dalena, Sonora, in 1851, the other a collection made by Palmer in 1890 at
Alamos, Sonora, on which was based the name Tithonia palmeri Rose.
HoFMEiSTERiA LAPHAMioiDEs Rose. This species, hitherto known only
from Baja California and its islands, was collected at Kino Point, Sonora,
20 March 1926, by Miss Frances Long (No. 80).
Malperia tenuis S. Wats. The first record of this rare species of
CaUfornia and Baja California in continental Mexico is afforded by a
luxuriant specimen collected at North Libertad Bay, Sonora, 21 March
1926, by Miss Frances Long. The corollas, in this comparatively fresh
specimen, are clearly ochroleucous.
MoNOPTiLON bellioides (A. Gray) Hall. This species has not been
recorded from Mexico. There is a sheet in the National Herbarium col-
lected at Libertad, Sonora, in 1875 by Dr. Streets, and recently specimens
have been received collected by Dr. Forrest Shreve and Miss Frances Long
at the same locality in March, 1926.
Dyssodia concinna (A. Gray) Robinson. This species, hitherto known
only from Arizona, was collected at Venugo, Sonora, 21 March 1926, by
Miss Frances Long.
Calycoseris wrightii a. Gray. Collected between Mesquite and
Altar, Sonora, 17 March 1926, by Miss Frances Long. It is recorded by
Hemsley (Biol. Contr. Amer. Bot. 2: 261. 1881) from "Sonora and along
the Rio Grande (Smith). Hb. Kew."