\ 



ENGELMANN — ADDITION TO NOTES ON AGAVE. 37 I 



ters of a single individual as those of the species. Full grown 

 leaves are at least 15-20 inches long, and 2-3 inches wide above 

 the base. The terminal spine is compressed and narrow-grooved 

 only in the young, not fully developed leaf; in the adult it is ter- 

 ete-triangular with a wide and shallow excavation above. — The 

 locality is Vallecito, not "Valcitron." 



Page 314. A. Shawii. To the liberality of Mr. Henry Shaw 

 we are indebted for the fine photographs of this species which 

 grace this number of our Transactions. They were taken by Mr. 

 J. C. Parker of San Diego, last January. Plate 2 represents a 

 group of these plants on the mesa near the coast of the Pacific, 

 which is seen in the distance ; one specimen is in full bloom, oth- 

 ers flowered in November and are now bearing fruit sparingly. 

 Decaying old plants are seen around, and young ones sprouting. 

 The phyllotactic arrangement of the short broad leaves is beauti- 

 fully displayed ; the bright spiny teeth appear almost white from 

 the effect of reflected light. The scape is conspicuously covered 

 by the broad, triangular, imbricated bracts. The figures are about 

 one-twenty-fourth of the natural size, or half an inch to the foot. 



Plate 3 shows, in Fig. i, a young plant ; its leaves are more 

 deeply concave than they are later, and therefore seem to be nar- 

 rower ; the teeth and their impressions on the adjoining leaves 

 are remarkably well developed. One-fourth of natural size. — 

 Fig. 2 is a cluster of flowers, exhibiting a densely compacted 

 mass, unfortunately not distinct enough in its details ; but the 

 outlines of the cluster, the enveloping bracts, the very long, mostly 

 vertical, anthers, and the exserted styles, are well rendered. It is 

 two and a half times less than the natural size. 



Page 322, line i. In the Berlin botanic garden an Agave atte- 

 nuata is cultivated which has a trunk 6 feet high ; it is said to 

 have grown 4 feet within the last 18 years. 



Addition to the Article on Yucca, p. 17 of this Vol. 



Page 47. Y. brevifolia has sessile, densely-flowered panicles ; 

 flowers greenish-white, inconspicuous, and fetid. Fl. in April 

 and May. — It is remarkable that at least in Southeastern Nevada, 



