NOTES AND OBSERVATIONS. 165 



J. W. Tourney, of the University of Arizona, while exploring 

 the Pinal Mountains, in southern Arizona, rediscovered the 

 species and contributed to the herbarium of the Garden 

 fruiting specimens, from which ripe seeds were obtained 

 for germination. 



The most striking feature of the Agave, which is well 

 described by both Torrey and Engelmann, is the combina- 

 tion of two of the customary marginal characters of the 

 leaves, for the dilated base is provided with short teeth 

 pointing upward, while on the fleshy part of the leaf the 

 margin is furnished with coarse white fibers, similar to 

 those of Schottii, near which the present species is prop- 

 erly placed. It is, as Dr. Engelmann has stated, the only 

 known species of the genus which combines these two 



characters. 



The specimens collected by Professor Tourney, while 

 they cannot be referred elsewhere than to parviflov w, differ 

 from the Schott material of the latter in the Engelmann 

 herbarium in that the leaves are more concave, whereas in 

 the Schott specimens the upper face is almost flat ; and in 

 having the capsules somewhat conically pointed above, and 

 green, whereas in the Schott specimens they are more 

 nearly globose, and delicately glaucous; but I take this 

 difference to depend only upon the age of the specimens* 



Explanation of plate 32. — Fig. 1, vegetating plant of Agave parviflora, 

 natural size; fig. 2, leaf, natural size; fig. 3, portion of fruiting spike, 

 natural size; fig. 5, seed, X 2 > — a11 from Professor Tourney's material. 

 Fig. 4, capsule, natural size; fig. 6, leaf, natural size; fig. 7, flowers, 

 natural size ; fig. 8, seed, X 2 , — a11 from Schott specimens in the Engel- 

 mann herbarium. 



7. Yucca Guatemalensis Baker.* 



In the Fourth Garden Report, the unripe fruit of this 

 species is described on page 184, and figured on plate 19. 



* Baker, Eefugium Botanicum, 1872, v. pi. 313, Journal Linn. Soc. Bot. 

 xviii. 222 ; Engelmann, Trans. St. Louis Acad. iii. 38, and Collected Writ- 

 ings, 289; Watson, Proc. Amer. Acad. xiv. 251; Trelease, Detail Illus- 



