ENGELMANN NOTES ON THE GENUS YUCCA. 5 1 



between the inner leaves ; flowers 1^-2^, in cultivation even 4 or 

 5 inches wide, usually greenish white or 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 

 dwarf forms the leaves are sometimes only half a foot long and 

 1-2 lines wide. 



Var. ^ is the southwestern form extending from West Texas 

 to Utah, Arizona and Northern Mexico ; trunk 3-5 feet high ; 

 leaves t-i^ 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 pani- 

 cle, 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, T. baccata^ may 

 belong here ; flower and fruit would decide. 



Var. y is found southeastward in Arkansas, Louisiana and 

 throughout Texas, distinguished by its wider, softer, less pungent 

 leaves, distinctly narrowed above the base, i-ij, rarely 2, feet 

 long, 5-8 lines wide in the middle, half as wide below ; scape 2-3 

 ft. high, flowers usually in a raceme, \-\ ft. in length, sometimes 

 paniculate, l\-^\ in. wide, greenish-white; green stigmas some- 

 times as long as ovary, often shorter ; capsule shorter than in the 

 other forms, 2-z\ inches long, sometimes constricted ; seeds 9-10 

 rarely 10-12 mm. wide. T. stricta, which is referred here, is said 

 to come from South Carolina, entirely outside of the limits of this 

 form, which makes a transition to the next. 



II. Yucca filamentosa, Lin.: subacaulis; foliis lineari-lanceolatis 

 supra basin latiorem contractis apice indurato seu molli; panicula pjra- 

 midata in scapo foliaceo-bracteato alte supra folia elata; stigmatibus 

 elongatis nunc distinctis albidis; capsula cuspidata, seminibus angustius 

 marginatis. 



Forma genuina : ssepius breviter caulescens ; foliis rigidioribus rectis 

 mucrone nunc obtusato brevi apicatis dorso scabridis, filis marginalibus 

 crebris plerumque circinatis; panicula ramis fere horizontalibus pyrami- 

 data densiflora scapo bracteis minoribus spatulatis instructo aequilonga 

 seu longiore Isevi ; staminibus ssepe pistillo sequilongis; stigmatibus 

 gracilibuis demum divergentibus seu recurvatis ; capsula minore plerum- 

 que medio constricta, dissepimentis secundariis fere semper rudimenta- 

 riis; seminibus minoribus. 



a. angustifolia : foliis (plurimis) lineari-lanceolatis e medio sensim 

 angustatis. — Y. filamentosa, 'Lin. ex Gronov. virg. 152. 



