50 MISSOURI BOTANICAL GARDEN. 
(1873). — Watson, Proc. Amer. Acad. 14 : 254. — Baker, Journ. Linn. 
Soc. Bot. 18 : 228. — Garden. 58 : 447. f. 
¥. filamentosa puberula Baker, Journ. Linn. Soc. Bot. 18 3 228. (1880). 
¥. jilamentosa Gattinger, Tenn. Flora. (1887). 58. (1901). 86. — Mohr, 
Contr. U. S. Natl. Herb. 6 : 441, as to northern localities. — Garden. 
58 3445. 7. — Park and Cemetery. 113184. /. 
Y. Meldensis Garden. 83 147. (1875). 
Acaulescent, cespitose. Leaves thin, flexible, the outer almost 
always recurved, 10 to 40 mm. wide, elongated lanceolate, very 
gradually long attenuate, mostly plicate, with fine long and rather 
straight thin marginal fibers except in two threadless garden forms. 
Panicle mostly pubescent. Maturing capsule dull grayish-green, the 
carpels variously and irregularly flattened in places, as if shaved off with 
a knife; when ripe, broad, usually constricted, and mostly flaring above: 
seeds rather dull, larger, 7 to 8 8 to 10 mm. — Plates 12-17. 76. 79. 
Asheville, N. C., to Gadsden and Anniston, Ala., in and. 
near the mountains. — Plate 87, f. 2. 
Occasional simple racemes are produced from small 
lateral crowns, when the main crown is in bloom (Plate 
13), as has been observed on some species of Agave, and 
one depauperate garden form produces an unbranched main 
inflorescence. 
An interesting winter adaptation of the foliage of this spe- 
cies is readily observed in the North whenever the tempera- 
ture remains for any time below the freezing point, for at 
and below this temperature the spreading unflexed middle 
leaves, which are ordinarily somewhat concave, have their 
margins rolled inwards so as nearly or quite to meet at 
the center, though they scarcely become involute in the 
proper meaning of that word. (Plate 14). 
The numerous intergrading garden forms of Y. flaccida 
seem capable of most natural arrangement as follows: — 
Petals broad, acute or acuminate. Panicle mostly pubescent. Y. flaccida. 
Inflorescence a raceme. f. orchioides.. 
Petals usually more lanceolate, attenuate. 
Leaves filiferous. 
Panicle very pubescent. var. glaucescens. 
Leaves transiently variegated. f. lineata.. 
