GKAMINB^. 531 



Stamens 2. Caryopds laterally compressed, free. — Herliaceous, stoloniferous grasses ; leaves 

 broad, petioled : ligular border m&'aiey ^&ma\e fastigiate : hr&acbea long, filiform, of ien 

 half-whorled ; spikelets long-pedicellate, jointed at the tase, elliptical-oblong. 



13. O.laxa, P. £. Leaves oblong-lanceolate, acuminate, glabrcscent: petiole and sheath 

 pubescent ; panicle expanded in fruit ; glumes lanceolate-acuminate, sterile shorter, unequal. 

 —Kih. Re'o. t. 71.— Stem 2'-3' high, leaves 6"-3" long, 12"'-8"' broad : petiole 6"'-12"' 

 long ; panicle 6"-13" long : spikelets at the extremity of the branches, greenish, 3'" long, 

 often l-flowered with a stipitate superior rudiment. — Hab. Trinida I !, Cr., in woods. Tort 

 George; [Mexico! to Brazil!]. 



.^ 10. UNIOLA, L. 



Spikelets flat-compressed, 2-many-flowered : glumes herbaceous, keeled, 3-6 sterile. 

 Palea compressed, 2-keeled : nerves distant. Caryopsis laterally compressed, free. — Herba- 

 ceous, stoloniferous grasses ; ligule ciliate ; spikelets paniculate. 



Sect. 1. Chasmanthus, Lk. — Spikelets small, ovate ; keels of the palea mngless. — 

 ' Panicle virgate, somewhat contracted. 



14. XJ. virgata, Gr. Rigid, stout ; leaves convolute-fdiform, flexuose, devoid of asperi- 

 ties ; panicle erect, lorjg-virgate : axis sulcate, pubescent : branches short, densely approxi- 

 mate, uppermost reduced; spikelets shortly pedicellate \-sided, %jlowered ; glumes 3- 

 nerved, shortly mucronate or bluntish, puberulous or glabrate, 6-4 sterile, ovate-oblong,. 2 

 lowest shorter. — SI. t. 72. f.- 1 : bad. — Poa, Poir. — Habit of Eragrostis cynosuroides. 

 Stem 4' high, 1"' thick, smooth, glabrous ; leaves often I'-IV long, rosular at its base (and 

 at the inferior distant nodes) ; panicle 20"-5"i its simple branches usually'l", spikelets 1'" 

 long, the latter straw-coloured, jointed at the base : sterile glumes placed right and left 

 against the axis ; stamens 3. — -Hab. Jamaica IJ iK«r(!/j; pUuba I, along the sandy seashore; 

 Haiti]. 



Sect. 3. Euuniola. — Spikelets- large, smooth, ovate-oblong ;. keels of the palea Kinged, 

 1 replicate. — Panicle spreading. 



/^ 15. XJ. paniculata, L. Stoat, rigid; leaves involute at the scabrous margin; panicle 

 dense: axis sulcate,. pubescent ; spikelets shortly pedicellate, distichous-1-sided, 8-16- 

 jlowered ; glumes ovate-oblong, painted, scabrous at the keel and margin, 4-6 sterile, fer- 

 tile 3-androus : 3 nerves stronger. — Catesb. Carol. 1. t. 32. — 4'-8' high ; leaves 2'-l' long, 

 4"'-6"' broad; spikelets 5"'-8"' long, straw-coloured.— Hab: Bahamas!, Sixains., on the 

 sandy seashore"; [Southern United States! ; Mexico ! to Ecuador !]. 



w 11*. BROMUS, L. 



Spikelets many-flowered -. glumes herbaceous, 2 sterile; fertile mostly awned below the , 

 summit. Stigmas inserted below the hairy summit of the ovary. Caryopsis adhering to 

 the palea. — Spikelets usually large, paniculate. 



Sect. ScHEDONOKUS, Fr. — Fertile glumes keeled, Z-dentate, sterile 1-3-nerved. Stigmas 

 included, or projecting above the middle of the flower. 

 l/'ie*. B. sterilis, L. Annual; stem glabrous; leaves flat-linear, pubescent: ligule 

 produced ; panicle spreading or nodding : inferior branches half-whorled ; spikelets linear- 

 lanceolate : fertile glumes 7-nerved, shorter than (or as long as) the straight awn, the latter 

 inserted helow-its 2-partite summit; palea ciliate. — Meichenb. Ic. Germ.f.\5S3. — Hab. 

 Naturalized in Jamaica !, Wils., in the mountains of S. Andrews, at 4000' alt. ; [Europe I]. 



\ 



12. ERAGROSTIS, P. B. 



Spikelets many(-2)-flowered, laterally compressed, oblong or linear : 2 glumes stenle, 

 fertile ones keeled, 3-nerved, awnless, deciduous : rhachis glabrous. Palea persistent on 

 the rhachis or deciduous with its joints. Stigmas projecting near the base of the flower. 

 Caryopsis free devoid of a fui-row.— Ligular harder, mostly ciliate ;. spikelets paniculate. 



