224 UNITED STATES AND MEXICAN BOUNDARY. 



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/9.? latifolia: foliis ovatis tenuibus basi obtusis sutnmis cordatis glabrls, vaginis ore ciliatis ; 



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spatba subtrifiora brevi rostrata basI subturbinata. — Shady alluvions of the lower Rio Grande, 

 September ; Scliott. Stem branching, (only the upper part seen,) glabrous. Leaves very thin, 

 2-3 inches long_, l-l^ inch wide, acute. Flowers only 2 and sometimes a rudiment in one 

 spatha. Sepals and petals nearly as in 0- Virginica, but the latter, Mr. Schott says^ are white. 

 We need more specimens, in order to determine whether the plant is a distinct species. 



CoMMELYNA LINEARIS, {Beutli. PI. Eavtiv, p. 27, var, LONGisPATHA :) caule erecto-subramoso ; 

 foliis lanceolato-linearibus complicatis, margine scabro ; spatha terminali complicata longissime 

 rostrato-attenuata ; pedunculis geminis, incluso 8-10-floro, exserto 1-2-floro ; petalo imparl 

 sessili lateralibus paullo breviore. — Near the Copper Mines, New Mexico, August; BigeTow. 

 (No, TOO, (in part) 1923 and 1930, Wright. No. 864, Fendler.) Stem 1-2 feet high, with 

 short axillary branches. Leaves 4-6 inches long, and about a q^uarter of an inch wide, tapering 

 at each end, slightly pubescent ; the sheaths a little swollen, fringed at the orifice. Spatha 

 pedunculate, cordate, not at all turbinate at the base ; the narrow tapering somewhat recurved 

 point 1-2 inches long ; peduncles of the spatha hispidly pubescent, the terminal one much 

 exserted. Exserted flowering peduncle about an inch long. Exterior sepal ovate, acute, 

 carinate ; the two lateral sepals united above the middle, obtuse. Petals bright blue, the 

 lateral ones unguiculate, the odd one about one-third smaller and sessile. Stamens 6; filaments 

 all glabrous ; 3 of the anthers abortive and cruciform ; the others fertile, oblong, one of them 

 larger and curved. Style long and slender, a little incurved toward the summit. Capsule 

 oblong, one of the cells usually abortive, the other cells 2-seeded. Seeds oblong or roundish, 

 corrugated. A well characterized species, remarkable for the long attenuated apex of the 

 spatha. I first received it from Lieutenant Abert, of the United States army, who collected it 

 on the Pecos river. 



Tkadescantia Yirginica, Linn. Sp. p. 412 ; Kunth^ Enura. 4, p. 81* Valley of the Limpio, 

 July ; Bigeloio. A glabrous narrow-leaved form. No. 1928 and 1929, Wright, are other 



varieties of this polymorphous species. 



Tradescantia miceantha (n. sp.): caule subramoso repente linea alterne pubescente ; foliis 



acutis glabris margine serrulatis, vaginis brevibus ore ciliatis ; 



Lower Eio Grande, 



carinam 



Stems flaccid, smooth, except the narrow alternate line 



ovatis subamplexicaulibus 

 umbella pauciflora sessili ; 

 towards the mouth, Octobe 

 of pubescence. Leaves about three-fourths of an inch long, and one-third of an inch wide, the 

 two uppermost connate. Umbels only terminal in our specimens. Pedicels 3-8 lines long, 

 nearly smooth. Flowers scarcely one-third of an inch in diameter. Sepals ovate-oblong, equal. 

 Petals pale blue, one-third longer than the sepals, obovate-orbicular. Stamens 6 ; filaments 

 all bearded ; anthers all similar and fertile ; the cells separated by a broad connective. Ovary 

 obovate ; style long and slender ; stigma peltate-capitate. This species has the aspect of Callisia 



repens. 



- Tradescantia biandra (n. sp.): caule subramoso erecto glabro, superne nudo ; foliis remotis 

 lanceolatis glabris margine ciliolato-scabris, floralibus brevibus acuminatis, vaginis ore nudis ; 

 umbella sessili multiflora ; pedicellis villosissimis ; filamentis imberbibus.— Mountains and 

 moist, rocky places, Puerto de Paysano, September ; Bigelow, (No. 700, Wright.) Stems 

 12-18 inches high, moderately branched above. Leaves 3-5 inches long, and 6-8 lines wide, 



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