394 



836. CAREX. 



|8. Jcochiana. Fr. oblong. Glume of fer- 

 tile Spikes vdi'h. a long awn. 



141. nutans. Barren Spikes 1-2 ; fertile 

 3-4, dense, erect, sessile ; lower sometimes 

 stalked. Sheatts 0. Fr. ovate, striate, pro- 

 longed into a short, smooth beak. Margin 

 rounded. Culm smooth, or only slightly rough 

 at top. p. 4, 5. Bloist shade. Vienna. 

 Schwarzbach and at Cilli in Styria. Hardly 

 belongs to this division. 



The following species has also been proposed. 



142. juncoides, Peesl, with 2 barren 



Spikes, and one remote, complete, sessile, erect 

 Spike. Seems like nothing else. 



C. fusca, SuTEE, is supposed by Gaudin to 

 be a var. of C. cmspitosa, and may, perhaps, 

 be C. rigida. C.f areata. Lap., seems allied 

 to C. hinervis. C. hastardiana, DC, has been 

 determined by Messrs. Cosson and Germain to 

 be a defective specimen of G. pilulifera. C. 

 costata, Peesl, and C. hadea. Pees., are quite 

 indeterminable. 



CXIII. GEAMINA. 



Flower composed of Glumes enveloping the organs. Seed 1, naked, superior. Stem jointed, 

 with a sheathing leaf at each joining. The Grasses may be divided into the following Tribes : — ■ 



1. ANDEOPOGONE^. — Spicules in sets of 2 or 3, of which one is 



sessile and the others staJied, clothed with long, silky hairs. In all the 

 Em'opean genera there is a valve-like rudiment of an exterior floret, which, 

 on account of the smaUness and delicacy of the parts, is sometimes dis- 

 tinguished with difficulty. Each spicule has only one developed floret ; 

 but some of the geuei'a have barren spicules as weU as fertile ones. 

 Glumes nearly equal, enclosing the Pales, which, except in Andropogon 

 Allionii, are very thin and tender ....... Gen. 837-841. 



2. PANICEjE. — Spicules of one perfect floret and a glume-like exterior ru- 



diment. Glumes very unequal, striated. Barren floret large, and pro- 

 tecting the smooth and polished coriaceous pale. In Lappago the outer 

 glume is filmy, the inner coriaceous ....... Gen. 842-847. 



3. ORYZE^. — Spicule of one perfect floret, and, in the European genera, 



without any additional rudiment. Glumes small and separate from the 



floret, or totally wanting. Pales of equal length, nearly valvular . . Gen. 848-850, 



4. PHALARIDEJlI. — Spicule of one perfect floret, and indications, more or 



less complete, of two other exterior imperfect ones ; the outer pale of the 

 perfect floret being always within the outer glume. Glumes large, in- 

 cluding the floret .......... Gen. 851-855. 



5. PHLEINE^. — Spicules 1 -flowered, without any exterior rudiment. 



Glumes nearly equal, larger and firmer than the scariose pales. Inflores- 

 cence in a spike-like panicle. Some species have a filiform interior 

 rudiment, on which, however, it seems impossible to divide the genera . Gen. 856-860. 



6. AGROSTIDEjE. — Spicules 1-flowered, without any exterior rudiment. 



Glumes nearly equal. Inflorescence a loose, equal panicle. This tribe 

 differs from the preceding chiefly in its inflorescence ; but the pales are 

 usually larger and finner in proportion to the glumes .... Gen. 861-866. 



7. STIPACEjE. — Spicules 1-flowered, without a rudiment. The convolute tip 



of the outer pale supporting an awn ....... Gen. 867-870. 



8. ARUNDINACE^.— Florets enveloped in long silky hairs within the 



calyx Gen. 871-874. ■ 



9. CHLORIDE.^. — Spicules 1- or more flowered, without an exterior rudi- 



ment, disposed in 2 rows on one side of a flattened rachis. A similar 

 disposition of the spicules sometimes occurs among the Andropogonece 

 and Panicem . Gen. 875-879. 



