294 NOTES ON THE GENUS YUCCA. 
strongly nerved segments, 13-3} inches long, 10-14 lines wide, the inner wider than the outer; also by the erect or 
slightly spreading, never recurved stamens, which are of the length of the prismatic ovary; and by the slender style, 
which in all the specimens seen by me is as long as the ovary; ovules 0.2 mm. thick. Capsule 2-2} inches long 
about an inch thick, acute or cuspidate or rostrate, prismatic, or very often variously constricted or asia often 
showing traces of the Yucca moth; secondary dissepiments sometimes, like those of most species, incomplete at top and 
bottom, ve not rarely, especially in very acute capsules, entire above or nearly so. Seeds 7-8 mm. long, with a dis- 
tinct but narrow margin. — This form is reported to be in cultivation in France from Mr. Trecul’s seeds, under the 
name of y. tortilis or contorta. 
Var. rigida looks very different indeed, with its smaller, pale, — or glaucous, often rough, straight 
leaves, only 8~12 inches long, and 3-6 lines wide, and its small wrinkled, less pointed capsule, 1} inches in [50] 
length, and seeds only 5-6 mm. in diameter ; the scape is said by <i Gregg to be 5-10 feet high; in ers not 
seen; the short beak of the fruit indicates a short style. Wright’s No. 1909 from Eastern New Mexico connects both 
forms. 
* * Folia margine filifera. 
10. Yucca ANaustironta, Pursh. Fl. ii. 227: subcaulescens; foliis (plurimis) e basi latiore linearibus levibus 
piereaae pungentibus ; stigmatibus ovario brevioribus viridibus ; capsula prismatico-ovata obtusa brevi-cuspidata, 
inibus magnis late marginatis. 
Forma genuina ; acaulis seu breviter caulescens ; foliis rigidis radiatim ‘porrectis pungentibus ; racemis plerum- 
que simplicibus inter folia fere sessilibus; florum segmentis late ovatis e cupreo virescentibus nunc albidis; capsulis 
majoribus vix unquam constrictis. 
ar. 8. elata: caule altiore ; foliis numerosissimis rigidis pungentibus nunc glaucescentibus filamentosissimis 
rare deundatis, demum refractis ; panicula oblonga seu lan obit supra folia elata; florum segmentis albidis angusti- 
oribus ; — ut supra. — Y. gneuatilia var. ‘‘liloen, Eng. in King Bot. 40th par. 496. 
mollis: acaulis ; foliis supra basin angustatis medio latioribus mollibus vix pungentibus ; racemis rarius 
ramosis yan en ipso bracteis brevibus lanceolato-subulatis ornato brevioribus ; capsula breviori nune cum seminibus 
angustius marginatis minore. — Yucca stricta, Sims Bot. Mag. 2222 fide Baker, Gard. Chron. 1. ¢ 
the forms of this species are characterized by the secondary axis descending horizontally, narrow leaves, 
bright green stigmas, and large capsules and seeds; but var. y. in many respects approaches to and forms a connecting 
link with the next species. They are peculiar to the West and Southwest. 
The typical Y. angustifolia is the more northern form of the plains from Northwestern Missouri and Western 
Towa west and northwestward to Colorado and New Mexico; flowers May and June, earlier than the allied species. 
Trunk none, or, farther south, short ; leaves very stiff and sharp-pointed, 1-2 or in cultivation 3 feet long, 3-6 lines 
wide ; raceme simple or with few short branches 1 or 2 to 3 or 4 feet long almost sessile, the base hidden 
between the inner leaves; flowers 14-2}, in cultivation even 4 or 5 inches wide, usually greenish white or [51] 
tinged with green-brown ; lobes broadly ovate ; stigma half the length of ovary ; capsule usually 3 inches long, 
half as thick; seeds 10-12 mm. wide. In diach forms the leaves are sometimes only half a foot long and 1-2 
lines wide, 
Var. 8. is the southwestern form extending from West Texas to Utah, Arizona, and Northern Mexico ; trunk 3- 
5 feet high ; leaves 3-1} feet long, 3-6 lines wide, rigid, often glaucous, with an abundance of long fibres or, rarely, 
almost destitute of them (Wright, Gregg) ; naked part of scape about as long as the panicle, together 6-8 feet, whole 
plant therefore often over 12 feet high; flowers mostly white, 2-2} inches wide ; capsules and seeds as large as in the 
type. It is not improbable that the narrow-leaved Mexican forms, doubtfully referred to p. 46, Y. baccata, may belong 
here ; flower and fruit would decide. 
Var. y- is found southeastward in Arkansas, + aulalain, and throughout Texas, distinguished by its wider, softer, 
less pungent leaves, distinctly narrowed above the base, 1-1}, rarely 2 feet long, 5-8 lines wide in the middle, half 
as wide below; scape 2-3 feet high, flowers usually in a raceme, }-1 feet in length, sometimes paniculate, 13-23 inches 
wide, greenish-white ; green stigmas sometimes as long as ovary, often shorter; capsule shorter than in the other forms, 
2-2} inches long, sometimes constricted ; seeds 9-10 rarely 10-12 mm. wide. _Y. stricta, which is referred here, is said 
to come from South Carolina, entirely peda of the limits of this form, which makes a transition to the next. 
11. Yucca FILaMENTOSA, Linn.: subacaulis; foliis lineari-lanceolatis supra basin latiorem contractis apice indu- 
rato seu molli; panicula pyramidata in scapo ee alte supra folia elata; stigmatibus elongatis nune 
distinctis athidia.s ; _capsula cuspidata, seminibus angustius marginatis. 
Forma genuina : sepius breviter caulescens ; foliis rigidioribus rectis mucrone nunc obtusato brevi apicatis dorso 
scabridis, filis margivalibae crebris plerumque circinatis; panicula ramis fere horizontalibus pyramidata densiflora 
seapo bracteis minoribus' spatulatis instructo equilonga seu longiore levi; staminibus sepe pistillo aequilongis ; stig- 
matibus gracilibus demum divergentibus seu recurvatis ; capsula minore plerumque medio constricta, dissepimen 
oribus. 
seminibus 
i 
