DEC. 1907. SPERMATOPHYTES FROM MEXICO GREENMAN. 255 



(1905), not HBK. MEXICO. State of Yucatan : in forests about 

 Xkombec, 5 April, 1903, C. & E. Seler, no. 4028 (hb. Field Mus.), 

 type; in forests near Xcolumkin, 5 April, 1903, C. & E. Seler, 

 no. 4040 (hb. Field Mus.) ; in forests about Izamal, March- 

 April, 1895, Dr. Geo.F. Gaunter, no. 477 (hb. Field Mus., and hb. 

 Gray), and in the same locality coll. of 1888, Dr. Geo. F. Gaunter, 

 specimens without number (hb. Field Mus.); vicinity of Izamal, 

 21 February, 1906,7. M. Greenman, no. 390 (hb. Field Mus.). 

 Acalypha mollis HBK. to which species some of the specimens 

 above cited have been hitherto referred is described as an herba- 

 ceous plant with distinctly pedunculate spikes, and with 2-3- 

 flowered reniform-ovate-n-i5-dentate bracts. On these charac- 

 ters alone A. Seleriana may be readily separated. The species 

 here proposed seems to be quite unique on account of the shrubby 

 habit, the numerous sender sessile or subsessile spikes of stami- 

 nate flowers, and the pistillate flowers solitary in the axils of 

 exceedingly minute 3 -parted bracts. 



Dalechampia Schottii Greenman, sp. nov. 



Stems twining, covered below with a grayish bark; branches 

 terete, striate, pubescent with spreading or reflexed hairs: 

 leaves petiolate, simple and undivided, subtrinervate from the 

 base, ovate or ovate lanceolate, 2-7.5 cm - l n g> I -5~4 cm - broad, 

 rounded to acuminate at the apex, mucronate-acute, subentire 

 or somewhat dentate in the lower half, obtuse to subcordate at 

 the base, usually bearing on the upper side at the junction of 

 petiole and blade two subulate appendages, pubescent on both 

 surfaces, glabrate above; petioles 0.5-2.5 cm. long, pubescent; 

 stipules narrowly lanceolate to almost subulate, 2-6 mm. long: 

 peduncles 1-3 cm. long, striate, pubescent; the petaloid involucral 

 bracts small, ovate, 6-12 mm. long, 3-8 mm. broad, acuminate 

 or merely acute at the apex, obtuse at the base, 3-nerved, spar- 

 ingly denticulate, externally pubescent, ciliate: calyx of the 

 staminate flowers 6-parted; divisions lanceolate, 2-2.5 mm. 

 long, acute, entire, glabrous: calyx of pistillate flowers 7-12- 

 parted; divisions linear-lanceolate, about 5 mm. long during 

 anthesis, pectinate and hirsute-pubescent, persistent and becom- 

 ing i cm. in length at maturity; ovary 3-celled, puberulent; 

 style cylindrical, stoutish; stigma subtrilobed, not dilated: 

 capsule depressed-globose, inconspicuously puberulent, reddish- 

 brown or blackish in the dried state; seeds subglobose, about 

 3.5 mm. long, rugulose. MEXICO. State of Yucatan: Merida, 

 3 August, 1865, Dr. A. Schott, nos. 534, 956 (hb. Field Mus.), 

 type; Chichankanab, Dr. Geo. F. Gaunter, nos. 1430 in part, 

 1463 (hb. Field Mus.); Merida, February, 1903, C. & E. Seler, 

 no. 3836 (hb. Field Mus.) distributed as "Dalechampia den- 

 ticulata Griseb.?;" Izamal, 22 February, 1906, /. M. Greenman, 

 no. 422 (hb. Field Mus.). 



Var. trifoliolata Greenman, var. nov. 



Leaves simple or trifoliolate ; divisions lanceolate, entire or 



