- NOTES AND OBSERVATIONS. ~ 163 
l. c. 8, are species unknown in flower, but perhaps belong- 
ing to the group Sarcoyucca. ) 
B. Clistoyucca.— Fruit pendent (or erect in the first), dry and coria- 
ceous but indehiscent: ovules and seeds thinner, marginless: al- 
bumen entire. 
Y. brevifolia, Engelm. Bot. King (1871), 496; 2. c. 
276, 293, 297, 298; Watson, /. c. 252; Baker, /. c. 221; 
Sargent, J. c. 218; Parish, Gard. & Forest, iv. 135. — Y. 
Draconis,? var. arborescens, Torr. Botany of Whipple in 
Rept. Pac. R. R. Surv. iv. (1857), 147. —If the varietal 
name were adopted, this would be Y. arborescens ( Torr.) 
—Plates 5 & 49. 
Y. gloriosa, L. Sp. i. (1753), 319; Engelm. J. c. 289, 
297; Watson, /. c. 251; Baker, 7. c. 225; Nicholson, J. c. 
232, f. 247-249.—Plates 6, 7 & 50. 
C. Chenoyucca. —Fruit erect, capsular with septicidal dehiscence: 
ovules and seeds thin, the latter broadly wing-margined: al- 
bumen entire. 
Y. rupicola, Scheele, Linnea, xxiii. (1850),143; Engelm. 
l. c. 293; Watson, 7. c. 253; Baker, 7. c. 222, and Bot, 
Mag. (3), xlvii. pl. 7172; Nicholson, J. c. 234.— Plate 51. 
Y. angustifolia, Pursh, Fl. (1814), 227; Engelm. Z. ¢. 
276, 294; Watson, J. c. 253; Baker 7. c. 226; Sargent, 
Gard. & For. ii. 244, 247 (habit figures) ; Nicholson, J. c. 
228, f. 238 & 239.—Plates 8 & 51. 
Y. elata, Engelm. Bot. Gaz. vii. (1882), 17; 7. c. 299; 
Sargent, 7. c. 219, and Gard. & For. ii. 368 (with habit 
figures ). — Y. angustifolia, var. elata, Engelm. Proc. St. 
L. Acad. iii. (1873), 50; I. c. 294.— Y. angustifolia, 
var. radiosa, Engelm. Bot. King (1871), 496. — The rule 
of priority, if applied to varietal names, would make this 
Y. radiosa (Engelm.)—Plate 9. 
Y. filamentosa, L. Sp. i. (1753), 319; Engelm. 7. e. 
295; Watson, 7. c. 254; Baker, /. c. 227; Nicholson, é. c. 
231, f. 240-242.—Plates 10, 52 & 53. 
(Y. Hanburii, Baker, Kew Bull. 1892, 8, from the de- 
