370 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
Pluchea sericea (Nutt.) Coville. , ARROW WEED. 
A very abundant Lower Sonoran species in the delta of the Colorado, noted along 
the gulf coast at San Felipe and Calamahué. On the Pacific coast it was seen spar- 
ingly in moist places at intervals from near Ensenada to a short distance south of San 
Andrés. It was taken in flower at San Felipe, on the gulf coast, June 20, and at the 
mouth of San Simédn River, a few miles south of San Quintin, August 29. On the low 
lands in the delta of the Colorado extensive areas are covered with a dense pure growth 
of arrowweed. 
Porophyllum gracile Benth. YERBA DEL VENADO, 
The ‘“‘yerba del venado,”’ as it is known in the Cape District, is one of the numerous 
species discovered at Magdalena Bay on the voyage of the Sulphur. It is common in 
places and generally distributed mainly in the Lower Sonoran Zone, from the south- 
western United States southward nearly throughout Lower California. Flowering 
specimens were taken by us at Pozo Altamirano, October 3; near Matancita, Novem- 
ber 15; at Cape San Lucas, December 30; and between San Bernardo and EI Satz, 
January 21. Brandegee records the species from Magdalena Island, San Jorge, Todos 
Santos, and San José del Cabo. It has been taken by other collectors at various locali- 
ties, including Cedros Island. It grows 30 to 100 cm. high and is said to have several 
economic uses. The local name is derived from the supposed fondness of deer for the 
plant, which is said also to be a favorite forage with cattle. Tea made of the leaves 
and flowers has astringent properties and is therefore believed to be useful in certain 
intestinal troubles. 
Porophyllum confertum Greene.’ 
The type of this recently described species was collected by us on Cerralvo Island, 
where it was flowering February 12. It is ashrub or woody herb, 1.2 to 1.8 meters high. 
Senecio goldmanii Greene.’ 
This species was based on specimens collected by us at about 105 meters elevation 
near Rosarito, where the plant was flowering September 25. The plant isashrub about 
a meter high. 
Tagetes lacera T. 8. Brandeg. 
A specimen of this species was taken in flower at 1,650 meters on the upper slope 
of the Sierra de Laguna, January 27. It isa shrub or woody herb, 1 to 1.5 meters high, 
apparently confined to the Upper Sonoran Zone in these mountains, where it is asso- 
ciated with oaks, the pinyon, and Nolina beldingi. 
Tumionella monactis (A. Gray) Greene. 
The zonal position of this shrub seems to be mainly the overlapping area between 
the Upper and Lower Sonoran zones from southern California south into northern 
Lower California, It was abundant at 1,110 meters on the plain near Alamo, there in 
flower June 11. 
Viguiera tomentosa A. Gray. 
This shrub seems to be known only from southern Lower California, where it was 
recorded by Brandegee as ranging from the coast up to the summits of the highest 
mountains. We found it flowering along the road from El Cajén to El Sacatén, Decem- 
ber 28. It grows 3 to 3.5 meters high. 
1See p. 311. 
