FEB. 1903. PLANTVE YUCATANJE MILLSPAUGH & CHASE. 



55 



ELEUSINE Gaertn. Fruct. et Sem. 1:7. 



Inflorescence of i-several spikes, digitate or approximate at the 

 summit of the culm. Spikelets several flowered, sessile and closely 

 imbricated in two rows along one side of a continuous rachis which 

 does not project beyond the "terminal spikelet, rachilla articulated 

 above the empty glumes. Glumes compressed, keeled, thin but 

 rigid, the first and second and sometimes uppermost empty. Grain 

 triconcave, enclosed in a thin pericarp. Stamens 3. 



Eleusine Indica (L.) Gaertn. Fruct. et Sem. 1:8. 

 Cynosurus Indicus L. 



Inflorescence finally exserted, of sometimes a single, usually 2-5 

 spikes, digitate or one placed 1-2 cm. below the others; spikes 2-9 



cm. long, 4-6 mm. wide, bearing 20-50 

 closely imbricated spikelets ; rachis 

 slightly zigzag, narrowly winged, a tuft 

 of tawny hairs at its base. Spikelets 

 3-5 flowered, 3.2x5.5 mm.. First 

 glume 1.5-1.8 mm., lanceolate, acute, 

 hispid on the green keel; second glume 

 2.5-3 mm - > lanceolate, acute, hispid on 

 the thickened green 5 -ribbed keel; 

 floral glume 3 mm., lanceolate, sub- 

 acute with a thickened, green, 5-ribbed 

 keel; palea 2.5 mm., acute, the nar- 

 rowly winged nerves distant. Grain 

 black, elliptic, "marked with comb- 

 like lines," .6-.7x 1.3 mm.; in section 

 trilobed, dorsal lobe subacute, lateral lobes rounded; pericarp thin. 

 Hab. Merida, Aug. and Sept., 1865, Schott 593*1, 738; "com- 

 mon in gardens as a weed, 5 to 10 inches high," Izamal, Jan. to Dec., 

 Gaumer 461, "abundant in shady places 15 inches high," Izamal, 

 1086, Chichankanab, 1515, 1525, 1552, 1553, islands of Holbox and 

 Cozumel, 1885 and 1886 (B), Calotmul 2441). 



DACTYLOCTENIUM Willd. Enum. Hort. Berol. 1029. 



Spikelets several flowered, the uppermost imperfect, sessile and 

 crowded in two rows along one side of a continuous rachis which is 

 extended to a naked point, forming unilateral spikes, these digitate 

 at the summit of the culm; rachilla articulated above the empty 

 glumes and between the florets. Glumes compressed, keeled, mem- 

 branaceous, first and second empty. Grain laterally compressed, 

 enclosed in a thin, loose pericarp. Stamens 3. 



Dactyloctenium 2Egyptium (L.) Willd. ibid. 



Cynosuriis ALgyptius L. 



Inflorescence exserted, of 2-4 digitate spi'kes 1.5-4 cm - l n g> 6-7 

 mm. wide, bearing 24-70 densely crowded spikelets; rachis narrowly 

 winged, hispid at least on the naked cuspidate summit. Spikelets 

 3-5 x 3-5 mm-, 2-flowered with 2 rudimentary florets above. First 



