— 86 — 



5— (3 mra longi. Flores petiolati; perianthium 3-5—4 mm longum; stamina exserta. Nux 

 triangularis, nigra, nitens, 2 mm longa (?). 



Forma P. davosianum (Briigger, 1. c) Folygono histortae magis affinis, quasi Poly- 

 gonum historfam parvum saepe bulbillis instructis exprimit; altera P. engadinense (Briigger, 

 1. c.) Polygonum invipnrum petiolis exalatis magis imitat, sed utraque opinione autorum 

 (Christ et alt.) vix hybrida. Helvetia: Ober Engadin, inter parentes (Briigger). 



Sect. V. Aconogonon Meisn., Folyg., 43, 55 et in DC, Prodr., XIV 1, 136. Perian- 

 thium coroUinum, plurimum album. Stamina plurimum 8. Stylus brevissimus, trifidus, 

 stigmatibus crassis capitatis. Glaudulae nullae. Nux acutangulo-triquetrum, nitidum, perigonio 

 immutato. Cotyledones accumbentes. Herbae, perennes vel frutices, floribus racemoso-pa- 

 niculatis. — Spec. nr. 26. 



26. Polygonum undulatum Murr. in Comm. Goett., V (1774), 34, t. 5; Willd., Spec, 

 n, 451. — P. polymorphum Led. Fl. Ross., HI 2, 524 pp. — Rhizoma repens; internodiis 

 radicantibus. Caulis erectus, ramosus, glaber vel pilosus, angulato-striatus, foliatus, — 1 m 

 altus. Oclireae ampLae, demum lacerae, hirsutae. Folia ovali- v. oblongo-lanceolata, longe 

 acuminata, basi in petiolum brevem breviter attenuata, plana vel undulata, subtus plurimum 

 in nervis et in margine modo ciliato-pilosa, rarius utrimque pilosa, superiora angustiora. 

 Inflorescentia terminalis vel rami eius inferiores etiam axillares, ampla, paniculato-pyramidalis, 

 aphylla; racemi cylindrici, laxiflori; bracteae parvulae, membranaceae , obtusae , 2 — 3 flores 

 subodoratos fulcrantes. Pedicelli perianthio albo, ochroleuco vel pallide roseo, 3 — 3-5 mm 

 longo breviores. Stigmata purpurea. Nux subtriquetra, nitida, laevis, brunnea, 4 — 5 mm 

 longa, perianthium vix superans. 



Formae sequentes observantur: 



1. typicum. P. tmdulatum Murr., I. c. — P. ciliatum Willd., Herb., nr. 7673 fide Ledeb. 



— P. alinnuvi v. undulatum C. A. Mey., Ind. cauc, 157. — P. polymorphum v. undulatum 

 Ledeb., I. c. 525; Meisn. in DC, Prodr., XIV 1, 139. — Caulis et inflorescentiae axes glabri, 

 rarius parce pilosi. Folia utrinque subappresse scabrido-pilosa. Ochreae hirsutae. — Hel- 

 vetia, Pyi-enaei. 



2. alpinum AIL, FL Pedem., II, 206, t. 68, f. 1 (1785); DC, FL franc, III, 569; Reich., 

 FI. Germ., 574; Gaud., FL Helv., HI, 45; Koch, Syn. fl. Germ., 619; ed. II, 713; Gren. Godr., 

 FI. franc, HI, 55; Willk., Prodr. fl. Hisp., I, 291; Wohlf., Syn. Fi. Deutsclil., II, 2248 pro spec. 



— P. sihiricum L. fiL, SuppL, 228 (1781) non PalL — P. divaricatum VilL, Hist. pl. Dauph., 

 ni (1789), 522 non L. — P. acidum Pallas, Reise, H (1773), 25; HI, 316 (nomen solum). 



— P. polymorphum v. alpinum Ledeb., L c, 524; Meisn., 1. c, 139. — De florum biologia 

 confer: Fischer, Bibl. bot. Hft. 48. — Caules et inflorescentiae axes glabri. Folia subtus 

 in nervis modo et in margine ciliato-pilosa, glabrescentia; cetera ut in priore. Frequeuter. 



Habitat in pratis fertilibus convallium Alpium editiorum in Gallia (Hautes alpes, 

 Dauphinee,); Pyrenees; Helvetia (Cant. Wallis, Uri, Berner Oberland, Tessin, Graubiindten), 

 Tirolia (ludicaria fide PolL); Pedemontia. — Karpati, Transsylvaniae Alpes, Bana- 

 tus (Skerisona l.Heuffel), Kroatia (Pljesevica £ Schlosser ?), Bosnia (Matorac in mte Vranica 

 leg. Beck), Serbia, Bulgaria, Romania, Macedonia, Thracia, Epirus, Oriens, Asia 

 centr., Sibiria etc — Floret mense Junio-Augusto. 



Essiccatae: Reich., Exs. nr. 869; Bourg., AIp. mar., nr. 255; Pyr. Hisp. nr. 67; PL 

 (VEsp. (1863), nr. 2494; Orphau., fl. Graec, nr. 1023; Wagner, It. orient. IL, nr. 155. 



