318 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
give Y. valida a range in the Peninsula from near Cape San Lucas northward to about 
latitude 29° 30’, and it probably reaches still farther. It is a tree species, growing 
in the vicinity of Yubay and southward to a height of 6 to 7.5 meters, in places form- 
ing a real forest. At Yubay the fruit was ripening September 18. Brandegee, who 
discovered and described the species, says: ‘This Yucca is certainly distinct from 
Y’. baccata' and does not seem referable to any of its Mexican varieties. It does not 
begin to bloom until about the middle of May, when Y: baccata to the north of it 
has already nearly mature fruit. It was observed from San Jorge to San Borgia [San 
Borja], and near Patrocinio formed forests miles in extent; the trees in general appear- 
ance strikingly like Y. brevifolia, though the trunks were much less covered with old 
reflexed leaves.” 
AMARYLLIDACEAE. Amaryllis Family. 
Agave nelsoni Trel.’ PLATE 111, D. 
This Agave, remarkable for the shortness and breadth of its leaves, was first seen 
and collected in flower at San Fernando, September 4. It was noted as abundant 
along the road from Pozo San Augustin to Onyx and a species supposed to be the 
same was seen in a number of places along the backbone of the Peninsula southward 
to near Yubay. The leaves in this species are 25 to 30 cm. in length and overlap 
for about half of this distance. The leaf margins are often nearly smooth, or the 
thorns inconspicuous and falling off almost at a touch. The flower stem is 3 to 7.5 
meters in height. Under the name shawii Brandegee records this species as very 
abundant between Rosario and San Quintin. 
Agave pringlei Orcutt. 
This Agave belongs to the pinyon and lower part of the yellow pine forest on the 
slopes of the Sierra del Pinal and San Pedro Mf4rtir mountains. It is a small species 
with short and rather narrow leaves, the flowers in dense clusters on 10 or 12 short stalks 
near the top of the main stem. 
Agave cerulata Trel.’ 
The type specimens of this Agave were collected in flower at about 240 meters 
altitude at Calmallf, and a species we took to be the same was abundant on rocky, 
rolling plains, and rocky slopes of hills from Calmallf south to San Ignacio. The 
leaves are not numerous; the flower stem averages 3 to 3.5 meters in height, 
Agave consociata Trel. 
We found this Agave rather common in places at about 1,110 meters altitude on 
the Alamo Plain, where it was ccllected June 11. The leaves were 30 to 50 in num- 
ber and the flower stalks 1.8 to 3.5 meters high. The type was collected by Parish 
at San Felipe, California. The species seems to range southward from the basal 
slopes of the mountains of the southeastern part of that State to the desert mountains 
of northern Lower California. Trelease records specimens collected by Mearns near 
the international boundary in Nachoguero Valley and by MacDougal in the Cocopah 
Mountains. 
Agave promontorii Trel.? PLATE 111, B. 
This large Agave, recently described, was found growing rather sparingly at 720 to 
1,500 meters altitude on the warmer slopes of the Victoria Mountains, in the Cape Dis- 
‘The plant here referred to as Yucca baccata is of some other species. 
2 See p. 311, 
