Tab. 8600. 



SANGUISORBA obtusa, var. amoena. 



Japan, 



Bosaceae. Tribe Poterikae. 



Sanguisorba, Linn. ; Benth. et Hoolc.f. Gen. Plant, vol. i. p. 624, sub Poterium ; 

 Focke in Engl. & Prantl, Pflanzenfam. vol. iii. pars 3, p. 44. 



Sanguisorba obtusa, Maxim, in Bull. Acad. Petereh. vol. xix. (1874), p. 160, 

 var. amoena, Jesson; a planta typica statura robustiore, glabritie, spicia 

 petiolulisque longioribus, foliolis subtus admodum glaucis differt. 



Herba perennis, caulescens. Caulis usque ad 12 dm. altus, 7 mm. diametro, 

 erectus, laxe ramosus vel simplex. Folia radicalia longe petiolata, 

 12-48 cm. longa, 5-16-foliolata ; foliola obtuso-ovata vel elliptica, basi 

 obtusa vel subeordata, 3 ■ 5-6 cm. longa, 2-5 cm. lata, supra pallide viridia, 

 subtus admodum glauca, margine obtuse vel acute serrata, rhachis ad 

 nodos parcissime pubescens; petiololi tenues, usque ad 2 - 5 .cm. longi. 

 Spica centrifuga, cylindrica, 5-9 cm. longa, rhachis tomentoso-pubescens ; 

 bracteae lanceolatae vel subspatulatae, apice acumiuatae, 3 mm. longae, 

 ciliatae, pilis albidis instructae ; bracteolae 2, lineares, 2 mm. longae, pilis 

 eis bractearum similibus. Flores sessiles, roseo-purpurei. Sepala 4, 

 persistentia, orbiculata, 3 mm. longa, apice calloso-mucronata, 3-nervia, 

 extra inferne pubescentia vel vetustiora fere glabra. Reccptaculi tubus 

 pubescens, quadrangularis. Discus inconspicuus. Stamina plerumque 6, 

 calyce triplo vel quadruplo longiora, filamentis planis medio dilatatis, 

 apice subito attenuatis e basi saepe plus minusve connatis. Antherae vix 

 1 mm. longae, roseae. Stylus calycem superans. Stigmata finibriata. 

 Achaenium coriaceum, 2 mm. longum ; tubo calycis indurato, 4-gono.— 

 E. M. Jesson. 



The hardy perennial Sanguisorba here figured is a 

 native of Japan which was first introduced into this 

 country by Messrs. Barr and Sons, in whose nursery it 

 flowered in August, 1910. Plants received from Messrs. 

 Barr early in 1913 flowered at Kew for the first time in 

 the summer of that year. It forms a plant of bushy 

 habit, three to four feet high, and produces flowers 

 freely throughout the summer months. So far no good 

 seeds have been produced, but the plant is readily 

 increased by division and grows freely in any position, in 

 good soil. Typical S. obtusa has been found as a wild 

 plant on Mt. Hayachine and elsewhere at elevations of 

 from 5000 to 7500 feet feet above sea-level in the island 

 of Nippon, and a variety, S. obtusa, var aUriJlora, has been 

 described from Mt. Kurikoma, Rikuchu. The variety 



December, 1916. 



