544 GEAMINEiE. 



spikes 2-8, suberect : axis filiform^; spikelets elliptical ohlong, pointed; lowest glume 

 wanting, second little shorter than the flower. — THn. Ic. t. 148. — Panicum, L. Paspalum, 

 fliiffff. Milium paniceum, Sw. — 4'-2' high ; spikes l"-2", spikelets i'" long ; flower 

 ■ purple; earyopsis flat-convex. — Hah. Jamaica (Sw,), in dry, sandy soil; [United States! 

 to Brazil !]. 



** Spikes spreading. 



79. D. marginata, Lk. Softly pilose below ; spikes 2-8, spreading : axis 3-winged, 

 about as broad as the spikelets ; spikelets lanceolate or oblong-lanceolate, pointed ; lowest 

 glume minute or abortive, second exceeding half the fiower, third h-nerved, pubescent at 

 the margin : its lateral nerves converging. — Trin. Ic. t. 93. — Milium digitatum, Sw. ! 

 (Paspalum, Kth. ; D. jamaicensis, Spreng.) : a form with glabrous leaves, and the lowest 



, glume often abortive ; what Swartz says of serrate leaves, refers to their margin sometimes 

 undulate, as occurs often in Panicea. D. eriogona, Lk. {Panicum, Schrad. !) : a form with 

 the leaves and their sheaths softly pilose. B. legyptiaca, Parlat. (non Retz). Panicum glau- 

 cescens, Ns. Distinguished from D. sanguinalis. Scop., by narrow, usually greenish 

 spikelets, and a longer second glume ; spikelets 1'" long. — Hab. Jamaica !, all coll., in dry 

 pastures ; S. Kitts !, Tils., Antigua !, Wullschl. ; [southern United States ! to Chile ! and 

 Brazil I ; Galapagos ! to Australia ! ; East Indies ! ; Arabia ! to trop. Africa !]. 



80. D. setigera, Rth. Softly pilose below, spikes numerous (-5-2), spreading : axis 

 narrowly 3-winged, usually bearing a long hair below several pedicels, little narrower than 

 or as broad as the spikelets; spikelets lanceolate or oblong-lanceolate, pointed; lowest 

 glume minute, second half as long as the flower, third b-nerved, pubescent at the margin : 

 all its nerves equidistant, nearly parallel. — D. horizontalis, W. (Panicum, Mei/., Ns. .'). 

 D. setosa, Desv. (Panicum Hamiltonii, Kth^. — Spikelets greenish, 1'" long. — Hab. 

 Jamaica 1, Wils. ; Antigua I, Wullschl., Dominica !, Imr. ; Trinidad I, Cr. ; [all tropical 

 countries ; Cape]. 



34. EUIOCHLOA, Kth. 



Character of Paspalum, but fertile glume exceeded by the sterile pair and terminated 

 with an included, pubescent awn or tuft of hairs. Spikelets hairy, pointed, pedicellate : 

 pedicel abruptly thickened at the joint below the flower. — Spicifonu racemes suisessile, 

 usually alternate along the common axis. 



81. E. punctata, iiTzm/^. Perennial; stem erect, pubescent above : nodes pubescent ; 

 , leaves and sheaths glabrous ; racemes erect, alternate, bearing many spikelets : axis pubes- 

 cent ; spikelets ovate-lanceolate, acuminate, sericeous-hairy, inferior geminate, superior 



* single ; superior sterile glume devoid of a palea, fertile awned : awn one-third as long as its 

 glume. — Trin. Ic. t. 153. — Milium, L. Helopus, Trin. Paspalum, Trin. — 1'-3' high; 

 spikelets 3'" long. — Hab. Jamaica (A'jo.) ; in wet pastures ; Antigua !, Wullschl., S. Vin- 

 cent I, Guild. ; Trinidad !, Cr. ; [Arkansas ! to Buenos Ayres!]. 



35. STENOTAPHRUM, Tr. 



Spikelets inserted into the excavations of the axis. Lowest glume minute, exterior : 

 second supporting the fertile flower (or abortive) : third of firmer texture, usually g . Fer- 

 tile flower coriaceous, awnless. — Long-creeping, stoloniferous grasses ; leaves distichous, 

 flat .- sheath spreading ; spike simple or inflorescence contracted : branches short, jointed. 



82. S. americanum, Schrk. Leaves linear, blunt ; sheath compressed : spike one- 

 ' sided : axis compressed, broader than the spikelets, convex-flattish on both sides : branches 



appressed, sunk into its 2-seriate excavations: spikelets 1-2, one at the base of tbe branch, 

 J the other (if present) at its summit. — Schrk. H. Monac. t. 98. Eottboellia dimidiata, Sw. 

 R. stolonifera, Pair. Diastemanthe platystachys, Steud. — Spikelets oblong-lanceolate, 

 ' pointed, 2'" long. — Hab. Jamaica!, Al. March; S. Kitts!, Antigua!, Wullschl, Domi- 

 nica !, Imr. ; Trinidad !, Cr. ; [Bermudas 1 ; Mexico ! to Buenos Ayres ! ; Sandwich 

 islaiids !]. 



36. ORTHOPOGON, R. Br. 



Sterile glumes 3, herjjaceous, awned, the 2 superior gradaaUy larger aud shorter-awned (or 



