Poterium.] LI. ROSACES. (J. D. Hooker.) 363 



CEYLON, Sir J. G. McKenzie ; Adam's Peak, Aluris. 



Very similar to P. diandrum in stature, habit, foliage, &c., but leaflets with fewer 

 teeth, petiole and midrib of leaflets underneath with flexuous hairs ; bracteoles orbi- 

 cular, clawed, ciliate ; calyx segments slightly hairy or scabrid on the back ; fruit 

 ^ in., trapezoid, with short wings and a bony endocarp. The flowers are probably 

 polygamous ; I find 12 imperfect ones in one bud, and fewer perfect, but my mate- 

 rials are very insufficient. This is a very little known plant, the only specimen I have 

 seen is Sir J. McKenzie's (in Herb. Benth.). Gardner described it from some found 

 by Mr. Alwis. Dr. Thwaites says that he has searched for it in vain. Like Agri- 

 . monia, the genus is unknown in the Indian "Western Peninsula. 



4. P. long-ifolia, Bertol. Misc. Dec. xxii. 14, t. 1 (SANGTTISORBA) ; tall, 

 glabrous, leaflets petiolulate linear-oblong crenate with, often accessory leaflets 

 at the base of the petiolules, heads cylindric, stamens 4, fruit short 4- winged. 



KHASIA MTS., alt. 5-6000 ft., Griffith, &c. 



Rootstock creeping, stout. Stem 2-4 ft., strict, much branched above. Leaves 

 10-1 6 in. ; leaflets 13 in., rigid, base subcordate oblique, under surface reticulate; 

 petiole stiff, erect ; stipules very variable, of radical leaves subulate, of cauline folia- 

 ceous fan-shaped and toothed or produced and pinnate, tip rounded. Heads 1-2^ in., 

 panicled, on slender stiff peduncles. Flowers purple, hermaphrodite; bracteoles ob- 

 long, fimbriate. Calyx-tube ellipsoid, 4-angled, compressed, pubescent, segments in 

 opposite pairs of which one is broader than the other, thick, and thickened towards 

 the tip which is notched with a mucro in the notch and 3-nerved, back with a few 

 hairs. Stamens with slender filaments. Style filiform, elongate, stigma capitate. 

 Fruit broader than long, ^ in. long, wings membranous. 



** Carpels 2. 



5. P. Sang-uisorba, Linn. ; Boiss. Fl. Orient, ii. 733 ; sparsely hairy, 

 leaflets petiolulate orbicular deeply toothed, heads globose, stamens about 20, 

 fruit trapezoid acute at both ends. 



WAZURISTAN (N. W. of the Punjab), alt. 5-8000 ft., Stewart. DISTRIB. Persia 

 and westward to the Atlantic, N. Asia. 



Stems suberect or ascending, leafy, with lax flaccid hairs. Leaves 3-6 in. ; leaflets 

 opposite or alternate, |-^ in., membranous, base rounded, petiolules very short ; pe- 

 tiole slender. Heads panicled. I have seen flowering specimens only, which seem 

 not to differ in any particular from the European plant. 



16. ROSA, Linn. 



Erect, sarmentose or climbing shrubs, usually prickly. Leaves pinnate ; 

 leaflets serrate ; stipules adnate to the petiole. Flowers terminal, solitary or 

 corymbose, white yellow or red, bracts rarely persistent. Calyx-tube persistent, 

 globose ovoid or pitcher-shaped; mouth contracted; lobes leafy, imbricate in 

 bud. Petals 5, large. Stamens many, inserted on the disk. Disk coating the 

 calyx-tube, all but closing its mouth* by its thickened margin, silky. Carpels 

 many, rarely few, in the bottom of the calyx-tube ; styles subterminal, free or 

 connate above, stigma thickened ; ovule 1, pendulous. Achenes coriaceous or 

 bony, enclosed in the fleshy calyx-tube. UISTRIB. N. temp, regions, rare in 

 America ; extending into Abyssinia, India, and Mexico ; species, about 30 very 

 distinct forms with innumerable subspecies and varieties. . 



The following roses are so commonly cultivated by the natives of India, that I 

 think it right to give a synopsis of them taken from Brandis' " Forest Flora," 199. 



