4i8 Field Museum of Natural History — Botany, Vol. II 



acute leaves; leaves 3 x 1.5-4 x 2.5 cm., glabrous, palmately 5-nerved at 

 the rounded base, margin slightly crenate-dentate. Inflorescence axil- 

 lary, the female flowers on long (3-6 cm.), pedunculate, wiry, 10-18- 

 bracted, open spikes; the male on a short, rudimentary, capitulate spike 

 separate in the same axils. Bracts of the female flowers 6-7 mm. 

 ovate, narrowed to the sessile base, acute, the margin few-serrate, 

 ciliate. Female flowers usually 3 to the bract, sessile; calyx 3-parted, 

 lobes narrowly lanceolate; styles 6, fibrillate, about four times the 

 length of the ovary. Male flowers 10 or more in a dense, pedunculate 

 head; calyx of four linear lobes with transparent, chaff-like margins. 

 Capsule strigose-hairy; seed ashen, smooth, ovoid-apiculate, 1.2x1 mm. 

 Yucatan, at Progreso in a shady coppice. Gaunter 1182 (Type in 

 herb. Field Museum, cat. no. 438,255), and at Chichankanab, Gaumer 

 2225. 



Croton Gaumeri sp. no v. 



Dioecious, fruticose, open stellate-pubescent. Leaves thin, lanceo- 

 late-acuminate, 3-4.5 X .75-1.50 cm.; petioles one-third the length of the 

 blade; male shrubs with leaf margins distantly glandulose, on some 

 individuals these glands become long-stalked though by no means on all 

 nor on all leaves on any one shrub. Leaves (male) papillate on both 

 surfaces, the margin generally distantly glandulose and often stalked- 

 glandular especially near the base, in young leaves both surfaces are 

 openly stellate-pubescent; stipules triangular, seldom found at the older 

 leaves; leaves on female shrubs scattered stellate-pubescent above, more 

 closely and prominently so beneath. Inflorescence terminal, in long, 

 slender spikes floriferous above, flowers pedicellate, bracts minute, the 

 male spikes sHghtly pubescent the female decidedly so and with long, 

 straight hairs mixed with the closely appressed stellate ones; male 

 flowers: caly:x stellate-hairy, 4-lobed, the lobes ovate, acute, rudimentary 

 petals 4, lanceolate, stamens about 20, filaments glabrous; female 

 flowers: pedicels half the length of the calyx, calyic stellate-pubescent, 

 5-lobed, lobes oblong-lanceolate, acute, margin glandular, rudimentary 

 petals 5, alternate with the caljrx lobes, narrowly ligulate and tipped 

 with a globular gland, appearing like stamens, styles 3 divided to the 

 base, digitately 4-lobed, lobes cylindrical, incurved at the tip. Ripe 

 capsule about 5 mm. diam., smooth as if varnished and bearing a few 

 isolated stellate hairs; seed scaraboid, smooth and shining greenish- 

 brown, 3.5 X 2.8 mm., canincle strongly reniform, thin, waxen. 



Yucatan, vicinity of Izamal. Unnumbered specimens collected by 

 Dr. Gaumer in 1894 (Type in herb. Field Museum cat. no. 187,265). 

 Two sheets of twigs of male shrubs appear in the series of Dr. Gaumer's 



