THE YUCCEAE. 33 



faint grooves which persist to the very inconspicuously 

 3-lobed perforate somewhat fimbriate stigma. The ovary 

 possesses three large plane septal nectar glands, passing 

 outward at top into conducting grooves which open at the 

 base of the pistil, and the abundant secretion of which, 

 when not removed, drips to the mouth of the pendent 

 flower so that toward the end of the day, when the flower 

 closes, the anthers, style and perianth are gummed together 

 into a nearly inseparable mass. The ovules resemble in 

 shape and arrangement those of the capsular species of 

 Yucca, and the erect capsule and thin flat black seeds are 

 equally suggestive of this section of Yucca. 



H. parviflora Engelmanni (Krauskopf) Trelease. 



H. Engelmanni Krauskopf, Notice to Botanists, etc., Aug. 1878 [cir- 

 cular]. Watson, Proc. Amer. Acad. 14 : 250. (1879). Baker, 

 Journ. Linn. Soc. Bot. 18:231. Coulter, Contr. U. S. Natl. Herb. 

 2 : 436. 



H. yuccaefolia Garden. 18 : 188. 20 : 71, 361. 21 : 324. Gard. Chron. 

 n. s. 18 :87, 109, 199. /. 34. Andrt, Rev. Hort. 58 : 64. Hooker, 

 Bot. Mag. iii. 56. pi. 7223. 



Flowers oblong-campanulate, about 25 mm. long; styles scarcely ex- 

 -ceeding the perianth. Plates l,f. 2. 2. 



Southwestern Texas, about the head of the west fork of 

 the Nueces river. 



In 1878, Mr. E. Krauskopf, of Fredericksburg, Texas, 

 issued an advertising circular mentioning H. yuccaefolia 

 and offering for sale plants of a Hesperaloe which he 

 had brought from the western dry branch of the Nueces 

 river and for which he proposed the name H. Engelmanni. 

 The flowers are described as bell-shaped, red, with short 

 thick style and anthers as much as a quarter of an inch 

 long, whereas in H. yuccaefolia the latter are said to be 

 several times shorter than the filiform style. Specimens of 

 this supposed second species were sent to Dr. Engelmann, 

 through Lindheimer, and are noted in his herbarium as 

 having been collected by Meusebach, though they are evi- 

 dently of the collection referred to by Krauskopf. 



