ADDENDA. 



Order GRAMINE^. 

 Genus, Stipa; Sub- Order, Stipacecz. 



GENUS, XII., 2. STIPA, Linnaeus. 



Spikelets pedicelled, i -flowered, panicled or sub-racemose, erect. 

 Empty glumes persistent, membranous, keeled. Flowering glume rigid, 

 rolled round the flower, with a terminal bent awn, spirally twisted below 

 the bend, and articulating on the flowering glume. Palea and grain 

 enclosed in the glume. Scales large. DISTRIBUTION OF GENUS : 

 TROPICAL AND TEMPERATE REGIONS OF BOTH HEM- 

 ISPHERES. Etymology : From the Greek word for tow, made from 

 flax. 



STIPA PETBIEI, n.s. 



PETRIE'S STIPA. 



(Plate, XVIL, 2.) 



AN elegant tufted grass, with long wiry roots, found at 1000 feet 

 altitude. Flowers December January. Perennial. Culms numerous, 

 12 1 8 inches high, erect, slender, smooth, grooved. Leaves shorter 

 than the culms, erect, smooth, involute, filiform. Sheathing leaves long ; 

 ligule membranous, sheathing. Panicle erect, 3 8 inches long, broad 

 at the base and tapering to an acute top ; branches filiform in distant 

 whorls, each branch with from 2 5 terminal spikelets. Spikelets i inch 

 long, i -flowered. Empty glumes membranous, glabrous, upper 3-nerved. 

 Flowering glume shorter, rolled round the palea and seed, villous on the 

 back, and with a short circle of hairs at base, 5-nerved, bifid at the top, 

 with a long central bent or waved awn, which is spirally twisted near the 

 bottom. Palea bifid, 2-nerved, villous or with scattered hairs on the 



