ROBINSON AND BARTLETT. — PLANTS FROM GUATEMALA AND MEXICO. 53 



this species somewhat resembles A. americana L., A. hispida Willd., 

 and A. sensitim Sw. It has, however, flowers which are much larger 

 than those of A. sensitive/,, and somewhat larger than those of the other 

 species mentioned. It differs furthermore from A. hispida in its entire 

 not dentate bracts, and from both A. americana and A. hispida in its 

 essentially glabrous foliage and fruit. 



v Cassia emarginata L., var. subunijuga Robinson & Bartlett, 

 n. var., foliolis saepissime 2 late oblongo-ellipticis G- 7 cm. longis 4-5 

 cm. latis supra molliter pubescentibus subtus flavido-tomentosis. — 

 Gualan, Department of Zacapa, Guatemala, 15 January, 1905, G. C. 

 Beam, no. 220 (type, in hb. Gray). This variety appears to agree in 

 flowers and fruit with the typical form, but it is noteworthy in habit 

 by reason of the striking reduction in the number of leaflets to two. 

 Occasionally, however, leaves with four leaflets occur on individuals on 

 which most of the leaves have but two leaflets ; so there is reason to 

 suppose that the plant is merely a varietal development from a form 

 with more numerous leaflets, rather than a separate species. 



Mimosa (Habbasia) gualanensis Robinson & Bartlett, n. sp., 

 ser. Leptostachyarum, caulibus gracilibus lignosis 4 m. longis aculeatis 

 tomentellis, aculeis sparsis parvis valde recurvatis compressis inaequal- 

 ibus maximis vix 2 mm. longis brunneis ; foliis majusculis 27 cm. latis ; 

 pinnis 3-jugis 9-14 cm. longis ; foliolis obovato-oblongis 2-4-jugis 4-5 

 cm. longis 2.4-3 cm. latis firmiusculis supra reticulatis utrinque glabris, 

 petiolo 7 cm. vel ultra longo rhachique valde armatis aculeis sparsis 

 numerosis recurvatis 0.7-2 mm. longis; rhacheolis etiam basin versus 

 aculeolatis ; spicis gracilibus 5 cm. longis densifloris breviter peduncu- 

 latis, pedunculis tomentellis ; floribus 2 mm. longis ; calyce 1.2 mm. 

 longo campanulato brevissime 5-dentato extus tomentello ; petalis 5 

 calyce subduplo longioribus oblanceolato-oblongis ; staminibus 10 ma- 

 turitate modice exsertis ; legumine immaturo 10 cm. longo 1.3 cm. 

 lato 15-seminato piano tenui glabriusculo leviter arcuato, stipite cras- 

 siusculo tomentello tereti 5-6 mm. longo. — Gualan, Department of 

 Zacapa, Guatemala, 19 January, 1905, C. C. Deam, no. 224 (type, in 

 hb. Gray). This species, although clearly of the Leptostachyae, does 



, not appear to be very closely related to any other. It should probably 

 be placed near M. guatemalensis Benth., and M. spirocarpa Rose. 



Tetrapteris ernarginata Bartlett, n. sp., fruticosa procumbens 

 3-5 m. longa ; ramis oppositis glabris griseo-brunneis ; ramulis viridi- 

 bus nigro-punctatis ; foliis oppositis, aetate utrinque glabris, juventate 

 albo-sericeis pilis mox deciduis, forma valde variabilibus, in ramulo 

 florifero sessilibus vel perbreviter petiolatis suborbiculatis 1-1.5 cm. 

 diametro cordatis emarginatis saepe mucronulatis, in ramulo foliifero 



