AUG. 1900. 



PLANTVE UTOWAN.E MILLSPAUGH. 



123 



line, 2.5-4x3.5-4.5 cm., composed of 16-20 pectinately spreading 

 spikelets. Spikelets rufous, sub- 

 -terete, linear, zigzag, 1x15-30 

 mm., 5 - 12 - fruited; rachilla 

 wings large, enfolding the 

 achene. Scales rufous, closely 

 appressed to the rachilla, those 

 of the same rank separated from 

 each other for a distance equal 

 to half their length, all ovate, ob- 

 tuse, less than twice the length 

 of the achene, the dorsum con- 

 vex, not keeled, the median stripe 

 broad, green, 7-nerved. Style 



twice the length of the achene, divided for half its length. Achene 

 black, elongate-obovate, .45-. 55x1.8 mm.; in section triangular, the 

 dorsal facets plane, the ventral deeply convex; markings as in the 

 preceding species, but the papillae much higher. 



Along the border of the lagoon south of Progreso (1671); and 

 in deep woods at Chichen Itza, Yucatan (1637, 1773). 



CYPERUS MICHAUXIANUS Schultes, Syst. Mant., 2:123. 

 Cyperus speciosus Vahl. 

 Cyperus acicularis Britton, on page 28. 

 Torulinium Michauxianum Clarke. 



Bracts leaf-like, 5-12 cm. long. Inflorescence a compound um- 

 bel, 15-20 cm. wide; primary 

 rays 8-10, i-n cm. long; sec- 

 ondary rays 1-6 cm. long. Spikes 

 oblong in outline, 1.5-2.5x3-4 

 cm., composed of 30-50 hori- 

 zontally spreading spikelets. 

 Spikelets brown, less terete 

 than in the preceding species, 

 1.5x10-12 mm., io-12-fruited; 

 rachilla wings smaller, enfolding 

 the lower half of the achene. 



5 Scales loose, obliquely spread- 



ing, slightly imbricated, reddish- 

 brown with a broad, green, minutely striate dorsal stripe; acute, 

 submucronate, less than twice the length of the achene. Style 

 longer than the achene, divided to near the base. Achene rusty- 

 black, ellipsoid, .5-.6x 1.4 mm., flatly triangular in section, the ven- 

 tral facet somewhat concave; surface marked by faint hexagonal 

 ridges, the large interspaces occupied each by a deep circular pit 

 with a prominent lip. 



Boggy spot in an open field at Caguas, Porto Rico (219). 



CYPERUS FILIFORMIS Sw. Prod. Veg. Ind. Occ. , 20. 



Torulinium filiforme Clarke. 



Bracts 2 or 3. 5-12 mm. long. Inflorescence in usually i, some- 

 times 2 spikes, flabellate in outline, 1.5 cm. wide, composed of 



