﻿228 



MISSOURI BOTANICAL GARDEN. 



Yucca decipiens n. sp. 



Y. valida Trelease, Kept. Mo. Bot. Gard. 13: 107-9. pi. 62-66, 

 S5 /. 3 (exclusive of the Lower California notes and of pi. 67, 

 which refer to the true Y. valida). 



Arborescent, very rough-barked, at length sometimes 2 m. thick, 8-10 m. 

 high and openly branched above. Leaves essentially smooth, elongated, 

 oblong-lanceolate, l-(mostly 2-) 4X30-60 cm. or more, ending in a 

 usually very heavy point, finely to coarsely filiferous or sometimes soon 

 denuded, with the whitish threads rather straight, the cluster of green 

 leaves on mature trees nearly isodiametric. Panicle not pendent, short- 

 stalked, about 1.5 m. long, broadly ovoid, mostly compact, glabrous or 

 with the pedicels minutely puberulous. Flowers creamy white: perianth 

 segments .9-1.5X3-4 cm., one series frequently narrower than the other: 

 style rather short. Fruit pendent, baccate, oblong, 2 X 6-8 cm ■ seeds 

 thick, 6-7 X 7-8 mm. 



Central table-land of Mexico, from Durango to below San 

 Luis Potosi: typically represented about Gutierrez. 



The more western representative of F. australis, which 

 differs conspicuously in its long-stalked elongated pendent 

 panicle, though very closely resembling it in general. 



Yucca periculosa Baker, Gard. Chron. 1870 : 1088.— Trelease, 

 Rept. Mo. Bot. Gard. 13: 103. 



F. baccata periculosa Baker, Journ. Linn. Soc. Bot. 18 : 229. (1880). 

 Y. circinata Baker, Gard. Chron. 1870: 1088. 



Y. baccata circinata Baker, Journ. Linn. Soc. Bot. 18 : 230. (1880). 

 Y. aloifolia Karsten «fe Stahl, Veg. Bilder. 1*. pi. 45. 



Arborescent, often cespitose, slender and rather smooth-barked, 

 becoming about 6 m. high, mostly with few ascending branches. Leaves 

 smooth, elongated, oblong- to linear-lanceolate, 2-3.5 X 35-50 cm., ending 

 in a rather short point, rather finely and abundantly filiferous with the 

 brown threads circinately coiled at least on young plants, the cluster of 

 green leaves about isodiametric. Panicle not pendent, short stalked, 

 scarcely 1 m. long, broadly ovoid, compact, tomentose. Pedicels 10-15 

 mm. long. Flowers creamy white: perianth segments mostly pubescent, 

 1-1.2 X 3.5 cm.; style abrupt and short. Fruit pendent, baccate, oblong^ 

 about as in Y. decipiens: seeds unknown. — Plates 13, I4. 



^ Southern table-land of Mexico, from Tehuacan toward 

 Esperanza and as far as Limon. 

 The southern representative of Y. decipiens, character- 



