ROT 



It O T 



comprefled, flowering at one fide ; ftriated with undulating 

 lines at the other. Flowers two to each joint, one rather 

 above the other, with fhort abrupt fcales at their bafe. — 

 Native of the Eaft Indies, and of the Brafils, in fandy 

 ground. Whether Thunberg's Cape plant be the fame, we 

 are not certain, there being fome confufion between our 

 Rotcb'ullia and the Panic um dimidiatum of Linnaeus ; which 

 latter we have never feen, but Koenig and Retzius infilled 

 on their being two very different things. R. dimidiate! is a 

 ftout, branched, fmooth grafs, with very broad, obtufe, 

 fpreading leaves, whofe (heaths, like thejlem, are very much 

 comprefled. Spites feveral, on folitary or cluttered, fimple, 

 axillary and terminal, ttalks, two or three inches long, about 

 their own length. Each fpike is tapering, (tout, jointed, 

 curioufly ftriated at the back, with alternately curved and 

 recurved lines ; bearing, at the oppofite fide, on each joint, 

 two angular^?owirrx, one elevated above the other, and each 

 accompanied by a fhort fcale at the bafe. The ttructure of 

 the flowers we have not been able to examine. 



13. R. exallata. Tall Hard-grafs. Linn. Suppl. 114. 

 Willd. n. 13. Brown Prodr. n. 1. Roxb. Corom. v. 2. 

 30. t. 157. (Stegoliacochinchinenfis ; Loureir. Cochincli. 

 51, on the authority of a fpecimen from the author, in the 

 fiankfian herbarium.) — Spike round, flowering on every 

 fide, beardlefs. Glumes obtufe, rough as well as the com- 

 mon receptacle. Leaves and their (heaths hairy. — Native 

 of the Eaft Indies, and of Cochinchina. A tall grafs, 

 with a {oXi<LJiem. Sheaths of the leaves furrowed, be(prinkled 

 with elevated points, each bearing a brittle. Spikes iolitary, 

 lateral, four or five inches long. 



14. R. formofa. Silky Hard-grafs. Brown n. 2. — 

 " Spike round, flowering on every fide ; its joints, as well 

 as the outer glumes of the perfect flowers, filky ; thofe of 

 the neuter ones fmoothilh and empty." — Gathered by Mr. 

 Brown in the tropical part of New Holland. 



15. R. perforata. Perforated Hard-grafs. Roxb. Co- 

 rom. v. 2. 43. t. 182-. — Spike round, flowering on every 

 fide, beardlefs. Glumes obtufe, fmooth. Common re- 

 ceptacle perforated in each joint, between the oppofite 

 flowers. Leaves fmooth. Sheaths woolly at their fummit. 

 — Native of low rich pafture-ground on the coaft of Coro- 

 mandel, but rare. Root fibrous. Stems feveral, about two 

 feet high, erect, round, jointed, folid, (lender, fmooth, 

 leafy. Leaves (mall, narrow, fmooth, except at their 

 edges. Sheaths very woolly at the fummit within, which 

 woollinefs extends a little way up the leaf. Spiles folitary, 

 (talked, terminal and axillary, (lender, erect, four or five 

 inches long. Flowers two to each of the lower joints, op- 

 pofite ; one to each ot the upper ones ; fometimes all per- 

 fect ; fometimes many of them have Jlamens only. This, 

 like moft of the other fpecies, is a coarfe grafs, not eaten 

 by cattle. 



16. R. corymbofa. Corymbofe Hard-graf?. Linn. 

 Suppl. 114. Willd. n. 14. Roxb. Corom. v. 2. 42. 

 t.181. (R. punctata; Retz. Obf. fafc. 3. 12. jEgilops 

 exaltata ; Linn. Mant. 575. Retz. Obf. fafc. 2. 27. 

 Ophiurus corymbofa ; Brown Prodr. Nov. Holl. v. 1. 207.) 

 — Spikes aggregate, thread-fhaped, fmooth. Glume of the 

 calyx ovate, obtufe, undivided, with reticulated depreflions. 

 — Native of ditches on the coaft of Malabar, an well as of 

 the tropical region of New Holland. Thejlem is tall, round, 

 leafy, finely ftriated, fmooth. Leaves flat, with long 

 fmooth (heaths. Spikes purplilh, many together, (lender, in 

 tufts, on fimple or compound, fmooth, cylindrical (talks, 

 from the (heaths of the fhort uppermoft leaves. Glume of 

 each calyx the length «f the joint, a little fpreading, at 



lead in the dry fpecimen, and curioufly reticulated at the 

 outfide. 



17. R. digitata. Finger-fpiked Hard-grafs. Sm. Fl. 

 Graec. Sibth. v. 1. 73. t. 92. — Spikes terminal, cluttered. 

 Receptacle angular, rough. Flowers partly (talked. 

 Glumes keeled, taper-pointed. Sheaths of the leaves hairy. 

 Gathered by Dr. Sibthorp in the low country about the 

 bafe ot the Bithynian Olympus. This is a large grafs, 

 three feet high, with all the appearance of being perennial. 

 Stem branched, leafy, round, (mooth. Leaves a foot 01 

 more in length, moderately fpreading, fiat, acute, rather 

 glaucous, with a pale central rib ; their upper fide rough, 

 and often hairy ; their (heaths long, clofe, ribbed, dotted 

 and hairy. Stipula of a few fhort hairs. Spikes feveral, 

 from nine to twelve inches long, erect, forming an oblong 

 tuft at the top of the ftem : rarely folitary. Receptacle, or 

 common Jla/k, of each zigzag, angular, rough-edged, every 

 joint accompanied at its concave fmooth fide by two flowers, 

 one fellile, the other on a ftout, angular, club-like (talk, 

 half the length of the correfponding joint. Calyx of two 

 unequal, awl-(haped, rough-keeled valves ; that of the 

 (talked flower containing two florets, one of which is male ; 

 that of the feflile flower only a folitary floret, fometimes 

 perfect, fometimes furnifhed merely with Jlamens. Corolla 

 in all the florets of two pellucid white glumes, fhorter than 

 the calyx. Anthers andfligmas yellow. 



18. R. muricata. Prickly Hard-grafs. Retz. Obf. 

 fafc. 3. 12. Willd. n. 15. (./Egilops muricata; lb. 

 fafc. 2. 27.) — "Spikes round, feveral together, on long 

 ttalks. Calyx fringed with prickles ; the neutral ones 

 cloven." — Found in the Ealt Indies, by Koenig. — Stems 

 angular, leafy. Sheaths of the leaves fringed. Spikes ax- 

 illary, two or three together, thicker than in R. exaltata, 

 each on a long (talk. Calyx (lightly downy, fringed with 

 marginal prickles. 



19. R. fanguinea. Red-flowered Hard-grafs. Retz. 

 Obf. /falc. 3. 25. Willd. n. 16. —Spikes axillary, alternate, 

 italked, approximated. Corolla awned at the bale. — Native 

 of China. — Stem femi-cylindrical, jointed, leafy ; the upper 

 joints invefted with dilated, hood-like (heaths, from each of 

 which iprings a folitary (pike, on a long (talk, the latter 

 concealed bv the (heath. Spikes thread-fhaped. Flowers 

 alternate. Corolla red, with a long awn from its bafe. 

 Retzius's defcription of a braciea, as well as of the parts of 

 the (lower, is not clear to us without a fpecimen. He fays 

 this grafs has entirely the afpedt of an Andropogon. 



R. monandra, Cavan. Ic. v. 1. 27. t. 39. f. I. Lec- 

 cion. 52, feems rather a fpecies ot Nardus, and is, we be- 

 lieve, the N. arijlata of LinnxuE, under which name it was 

 fent to Mr. Davall, by fignor Molineri, from Piedmont. 

 See NARDUS, 11. 2, where Cavanilles may fafely be cited. 



ROTTE, in Geography. See Rotai. 



ROTTELN, atownof the duchy ot Baden; five miles 

 N.N.E. of Bale. 



ROTTEN Stone, in Mineralogy, a decompofed ftone, 

 ufed for polifhing. See Tripoli. 



ROTTENBACH, in Geography, a town of Bavaria, in 

 the territory of Nuremberg; three miles S.S.W. of Lauf. 



ROTTENBERG, a town of Bavaria; i + milesN.N.W. 

 of Landfhut. 



ROTTENDEAN, a village of England, in SufTex, 

 very near the fea, and frequented for fea-bathing j four miles 

 S. of Brighthclmftone. 



ROTTENEG, a town of Aullria ; 13 miles S.W. 01 

 Freyttatt. 



ROTTENMANN, atownof the duchy of Stiria; 20 



miles 



