FEB. 1903. PLANTVE YUCATAN^E MILLSPAUGH & CHASE. 



45 



involucres, lox 10 mm., including spines, on pubescent pedicels, the 

 6-8 pubescent divisions spine-pointed; spines spreading or reflexed, 



3-5 mm. long, pubescent to cil- 

 iate at the base, retrorsely mi- 

 nutely barbed toward the needle- 

 pointed apex; basal bristles few, 

 stout, scabrous. Spikelets 2 in 

 each involucre, 1.7x5.5 mm., 

 ovate-lanceolate, acuminate. 

 First glume y$ the length of 

 spikelet, ovate, acute, faintly 

 3-nerved, hyaline; second 2 /$ the 

 length of spikelet, broadly ovate, 

 obtuse, 5-nerved, middle pair of 

 internerves puberulent; third 

 equal to floral glume, acute, 

 5-nerved, middle internerves 

 puberulent, subtending a sca- 

 brous palea of its own length; 

 fruiting glumes 1.7x5.2 mm., ovate, acuminate, glume 5-nerved, 

 basal keels winged, pubescent near the margins above; palea puber- 

 ulent above between the 2 nerves. Grain stramineous, obovoid- 

 oblong, i.4x 2.2 mm.; in section flattened convexo-concave. 



Hab. Sandy east shore of island of Cozumel, about 4 miles 

 from the northeast point, rare, Millspaugh PI. Utowance 1607, south- 

 west point of Perez Island, Alacran Shoal, 1756. 



STENOTAPHRUM Trin. Fund. Agrost. 175. 



Inflorescence a spike-like panicle, the spikelets solitary or 2-4, 

 forming a short partial spike embedded in the alternate notches on 

 one side of the broad, striate, glabrous axis; rachis of the spike with a 

 chaff-like prolongation. Spikelets 2-flowered, the lower staminate. 

 Glumes 4, fruiting glumes indurated, margin of floral glume not 

 unrolled. Grain dorsally compressed, enclosed in the fruiting glumes, 

 free. Stamens 3. 



Stenotaphrum secundum 



(Walt.) Kuntze Rev. Gen. 

 PL 2:794. 



Ischcemum secundum Walt. Fl. 

 Car. 249. 



Stenotaphrum Americanum 

 Schrank. 



Spicate panicle included at 

 the base or short exserted, 7-10 

 cm. long, 5-6 mm. wide. Spike- 

 lets 2x5 mm., pale stramineous, 

 oblong-lanceolate, acute, glabrous, 

 solitary or 2-4 sessile on the flat- 

 tened ciliate rachis. First glume 

 VL the length of the spikelet, 



obtuse, nerveless; second 

 7-nerved; third somewhat indurated, 3-nerved, subtending a 



acute, 

 similar 



