54 cxix. POLYGONACE/E. (J. D. Hooker.) [Polygonum. 



69. P. dumetorum, Linn.; Boiss. Fl. Orient, iv. 1032; stem twining 

 or prostrate, leaves broadly ovate-cordate or subhastately cordate acuminate, 

 fruiting perianth broadly oblong or obovate, 3 outer sepals broadly winged, 

 pedicels very slender, not winged to the base, usually jointed below the 

 middle, nut in. long. Meissn. in DC. Prodr. xiv. 1. 135; Fl. Dan. 

 t. 756; Engl.Bot.1. 2811. 



TEMPERATE HIMALAYA; from Kunawnr to Kashmir, alt. 4-9000 ft. DISTEIB. 

 Europe, N. and W. Asia. 



Habit of P. Convolvulus, but stem terete, flowers more racemose, pedicels capillary, 

 and fruiting perianth very different. This last varies exceedingly in size and shape 

 from elliptic oblong in. long, to cuneate-obovate | in. long and tapering into 

 the shortly winged pedicel. I find no difference between nuts of this and P. 

 Convolvulus. 



70. P. pterocarpum, Wall. Cat. 1690 ; stem twining, leaves broadly 

 ovate-cordate acuminate, fruiting perianth cuneate-obovate rarely broadly 

 oblong, 3 outer sepals broadly winged, pedicel very slender winged often to 

 the "base, nut in. long. Meissn. in Wall. PI. As. Bar. iii. 62, and in DC. 

 Prodr. xiv. 1. 135; Sab. In Trans. Linn. Soc. xvii. 113. Polyg. n. 62, 

 Serb. Hook.f. <$f T. 



TEMPERATE HIMALAYA ; from Sikkimto Simla, alt. 6-9000 ft., also in Kashmir, 

 Stetoart. 



Probably only a state of P. dumetorum, but the fruiting perianth is usually much 

 larger, sometimes \ in. long, or even 1^ in, including the winged petiole, and the nut 

 is always larger. In both there are obscure lines of pubescence on the stem and 

 pet'oles. 



DOUBTFUL AND IMPERFECTLY KNOWN SPECIES. 



P. (Bistorta ?) GRIFFITHII, Hook. f. ; very stout, leaves 6-7 in. long-petioled 

 coriaceous oblong-lanceolate acuminate pubescent beneath, petiole as long as the 

 blade, raceme incurved very stout, bracts lanceolate densely imbricate. Bhotan 

 Himalaya; on rocks above Sanah, alt. 9500-10 y OOO ft., Griffith (Itin. Notes, 

 p. 410, n. 637). A remarkable plant, and quite unlike any other, probably near to 

 P. Bistorta, but much more robust. The curvature of the top of the peduncle is 

 possibly due to this terminating a pendulous branch. The specimens are very imper- 

 fect, consisting of old, apparently radical leaves, and hollow glabrous stems or 

 peduncles, a foot long and as thick as a goose-quill, each bearing the remains of two 

 cauline leaves, and terminated by a stout incurved raceme 2|- in. long. The raceme 

 is clothed with membranous bracts enclosing each many pedicels, from which the 

 perianths have fallen. The stipules on the stem are 1-2 in. long, quite glabrous, 

 with free tips. 



P. HAGEI, Royle mss ; Sab. in Trans. Linn. Soc. xviii. 110 ; Meissn. in DC. 

 Prodr. xiv. 1. 139, from Nagkunda, is probably P. polystachyum, a common plant of 

 that locality. 



P. PALUDOSUM, Griff. Hep. Sot. Gard. Calcutt. 1843, 39, is a mss. name and 

 unidentifiable. 



POLYGONEARUM FAMILL& SEDIFOLIA, Wall. Cat. 6286, 866 p. 22. 



4. FAGOPYRUIVX, Gcertn. 



Erect herbs. Leaves deltoid, hastately deltoid, or -cordate. Flowers in 

 terminal or axillary cymes. Perianth, 5-partite; segments subequal, not 

 enlarged in fruit. Stamens 8, alternating with glandular disk-lobes. Ovary 

 3-gonous ; styles 3, stigmas capitate. Nut much longer than the perianth, 

 3-gonous. Cotyledons very broad, twisted, or rolled round the ascending 

 radicle. Species 3, Europe and Temp. Asia, one cultivated. 



