290 NOTES ON THE GENUS YUCCA. 
Flowers, as in the genus, wide open in the evening, 3}-4 inches wide, whitish, tinged externally with green or 
brownish or reddish green; segments ovate, acute, or nearly lance-ovate, the inner longer and wider than the [40] 
outer ones, minutely pubescent at tip (which, perhaps, is meant by Elliott’s “sparingly ciliate”). Stamens 
often as long as the whole pistil, or at least as long as the ovary, straight at first or only oe but at last bate 
recurved and even variously twisted ; filaments in some forms scarcely papillose, in others strongly hispid ; anthers 
deeply emarginate at tip; stigmas narrower than the prismatic ovary and much longer than w ide, divided upw An and 
at last somewhat divergent ; the ovules thinner than usually in this section, — in the wild flowers examined by me 0.25- 
0.30 mm., in cultivated ones 0.25-0.33 mm. thick. I have not been able to obtain the fruit, which is said to be 6- 
angled, pulpy, and of a deep purple color, by Elliott and by Nuttall, both of whom singularly enough omit to describe 
the much more common fruit of Y. alotifolia. The seed which was sent to me is smaller and thinner than that of that 
species (5.2-6.0 mm. in the longest diameter and 1.8-2.0 mm. thick), but otherwise very similar to it.—The flowering 
time seems to be July to October, very often in South Carolina in autumn. 
The cultivated plants which I have seen scarcely differ from this form ; their flowers are sometimes larger, and 
either whitish or cream-white, or very often externally greenish-purple; they seem to open usually in July and 
ugust, or sometimes later in the fall. 
Y. acuminata, Sweet, and Y. obliqua, Haw., garden species, the native country of which is unknown, seem to 
belong to the typical form. 
he variety which I have distinguished as var. plicata I have found under the name of Y. plicata in Mr. G. 
Thuret’s gardens at Antibes near Nice, flowering in February and March ; it has a trunk over 2 feet high, with thin 
but stiff much folded leaves, 14-2} feet long and 2-2} inches wide, glaucous above, rough beneath, serrulate near the 
base; panicle large, flowers over 4 inches wide, externally tinged with brown-red; stamens as long as the ovary, 
which is contracted into a narrow neck, a sort of a style, bearing the thicker, divaricate stigmas. 
ar. recurvifolia is the well known and commonly cultivated, elegant garden form, said to come from Georgia, 
where Elliott also seems to have seen it, but nobody apparently has found it since. I cannot distinguish it 
from the type but by the flaccid, gracefully recurved peak Y. recurva, Haw., and Y. pendula, Sieb. and [41] 
Carriere, are synonymous, and Y. superba, Haw., Y. rufocincta, Haw., seem not to ‘iffer. Y. ensifolia, Baker, 
Ref. bot. V. t. 317, and the smooth-leaved Y. Eilacombit, "Baker, Guard: Chron. 1. ¢., Ref. bot. ib. t. 318, are interme- 
diate forms connecting this variety with the typical plant. 
ar. planifolia is also based on a single specimen, which I found in September, 1868, in flower in the botanic 
garden of Genoa, under the name of Y. glauca. Its short trunk, long and narrow (23 feet long, 14 inches wide), even, 
not at all plicate leaves, and especially the sbort stigma, which is almost as thick as the ovary and resembles that of 
Y. alotfolia, distinguish this form. Flowers whitish, smaller, 2 or 24 inches wide; filaments as long as the pistil; 
anthers small, entire above ; ovules only 0.26 mm. thick; fruit anknown. Could it be the Y. glauca of gardens? 
Yucca flexilis, Carr., Rey. Hort. viii. t. 89, to which Mr. Baker refers his Y. pruinosa, Gard. Chron. 1. ¢., and Y. 
tortulata, Baker, ib., may be smooth-leaved forms of Y. gloriosa; they are thus far only known as acaulescent, and in 
err only. Eeaves of both 2-2} feet long, 1} inches wide, stiff and pungent; the edges serrulate toward the 
rrowed base, 
Yucca Boerhaavii, Baker, Gard. Ch. 1870, p. 1217: caulescens, e basi latissima lanceolato-linearibus elongatis 
infra vix angustatis planis levissimis, in mucronem herbaceum mollem excurrentibus. 
This plant makes a short trunk ; leaves 27 inches long, about 9 lines wide, with traces of marginal denticulation ; 
flowers are unknown. —It may be an extreme form of Y. “slave 
Yucca DeSmetrana, Baker, 1. c.: caulescens, foliis plurimis lanceolato-linearibus brevibus versus basin angus- 
tiorem obsolete dontiealats crassis levissimis in mucronem vix pungentem excurrentibus. 
This little plant is cultivated in many gardens, but has, I believe, never flowered. The very fleshy purplish- 
green leaves are only 10~15 inches long, 6-9 lines wide, and scarcely pungent. Its native country is unknown. 
5. Yucca Trecuniana, Carriére Rev. Hort. vii. p. 280, 1858, Baker, Gard. Ch. 1. c. p. 828: caule elato ramoso; 
foliis longissimis rigidissimis profunde concavo-canaliculatis margine brunneo serrulatis tune integris demum 
parce filamentosis pungentibus subtus asperrimis ; panicula densiflora ovata subsessili leviuscula, bracteis infe- [42] 
rioribus amplis ovatis seu ovato-lanceolatis pungenti-cuspidatis perg t albidis, summis ovatis seu lanceo- 
latis albis ; staminibus pistillo vix brevioribus uncinatis; ovario prismatico in stylum ‘stigmatibus gracilibus coronatum 
attenuato; bacca fere cylindrica elongata rostrata. — Y. longifolia, Engelm. in sched, 1846; Buckley in Proc, Acad. 
Phil. xiv. 8, 1862. 
Texas from the Matagorda Bay and the Brazos and Guadaloupe, south and southwestward into Mexico, at least 
as far as Saltillo, Parras, and Chihuahua, on the sea-beach and in the interior, on the gravelly overflowed banks of 
streams and on the stony declivities of their slopes ; flowering in April and May. —Specimens from Texas and full 
notes were supplied by F. Lindheimer, Mexican ones by Dr. Wislizenus and Dr. Gregg. 
