50 TRANS. ST. LOUIS ACAD. SCIENCE. 



inches long, and 3-6 lines wide, and its small wrinkled, less 

 pointed capsule, ih inches in length, and seeds only 5-6 mm. in 

 diameter ; the scape is said by Dr. Gregg to be 5-10 feet high ; 

 flowers 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 angustifolia, Pursh. Fl. ii. 227 ; subcaulescens ; 

 foliis (plurimis) e basi latiore linearibus lsevibus plerumque pun- 

 gentibus ; stigmatibus ovario brevioribus viridibus ; capsula pris- 

 matico-ovata obtusa brevi-cuspidata, seminibus magnis late 

 marginatis. 



Forma genuina : acaulis seu breviter caulescens ; foliis rigidis 

 radiatim porrectis pungentibus ; racemis plerumque simplicibus 

 inter folia fere sessilibus ; florum segmentis late ovatis e cupreo 

 virescentibus nunc albidis ; capsulis majoribus vix unquam 

 constrictis. 



Var. 8. data: caule altiore ; foliis numerosissimis rigidis 

 pungentibus nunc glaucescentibus filamentosissimis rare denuda- 

 tis, demum refractis ; panicula oblonga seu lanceolata supra folia 

 elata ; florum segmentis albidis angustioribus ; capsulis ut supra. 

 — T. angustifolia var. radiosa, Eng. in King Bot. 40th par. 496. 



Var. X- mollis : acaulis; foliis supra basin angustatis medio 

 latioribus mollibus vix pungentibus ; racemis rarius ramosis scapo 

 ipso bracteis brevibus lanceolato-subulatis ornato brevioribus ; cap- 

 sula breviori nunc cum seminibus angustius marginatis minore. — 

 Tucca slricta, Sims Bot. Mag. 2222 fide Baker, Gard. Chr. 1. c. 



All 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 ap- 

 proaches to and forms a connecting link with the next species. 

 They are peculiar to the West and Southwest. 



The typical T. angustifolia is the more northern form of the 

 plains from Northwestern Missouri and Western Iowa west and 

 northwestward to Colorado and New Mexico ; fl. 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 



