ROSACE AE. — SPIRAEA 439 



Spiraea acutifolia Willdenow, Enum. PI. Hort. Berol. 540 (1809). — Guimpel, 

 Otto & Hayne, Abbild. Holz. 9, t. 9 (1825). — Zabel, Slrauch. Sjnr. 20 

 (1893). 



Spiraea hyperidfolia, var. acuta Seringe in De Candollo, Prodr. II. 543 (1825). 



Spiraea hyperidfolia, var. acutifolia Dippel, Handb. Laubholzk. III. 464 (1893). 



The typical S. hyperidfolia does not seem to occur in China. 



Spiraea hypericifolia, var. hupehensis Rehder, n. var. 



Frutex metralis ramis virgatis erectis; ramuli hornotini glabri. 

 Folia oblonga v. elliptico-oblonga, utrinque acuta, apice argute serru- 

 lata, glabra, 1-1.8 cm. longa et 3-6 mm. lata. Flores in umbellis 

 2-4-floris, 8-10 mm. diam., pedicellis 8-14 mm. longis; petala orbicu- 

 lari-obovata, 3-4.5 mm. diam.; stamina petalis dimidiis paullo brevi- 

 ores; folliculi sepalis duplo longiores, stylo recurvo. 



Western Hupeh: Patung Hsien, Yangtze banks, steep dry clifTs, 

 30-300 m., March 24, 1908 (No. 2754) ; without precise locahty, March 

 1901 (Veitch Exped. No. 1754). Shensi : Yenan Fu, May 1910, W. 

 Purdom (No. 346). 



This variety differs from S. hypericifolia, var. Plukinetiana Seringe in the acute 

 leaves sharply serrate at the apex, and from var. acuta Seringe in the large, nearly 

 orbicular petals 3-4.5 mm. broad. Without well-developed leaves it looks much 

 like S. Thunbergii Siebold, and probably the specimens from central China which 

 have been referred to S. Thunbergii belong to this variety.^ 



^ In this group belongs the following new species from Yunnan: 



Spiraea fulvescens Rehder, n. sp. 



Frutex vix metralis ramis virgatis; ramuli hornotini dense tomento fulvescenti 

 vestiti, teretes, annotini tomentosuli, tarde glabrescentes ; vetustiores fulvescenti- 

 cinerei, cortice lamellis parvis solubili, ramulis valde abreviatis numerosis ferrugineo- 

 tomentosis ob bases petiolorum persistentes congestos dense verrucosis instituti; 

 gemmae parvae, globoso-ovoideae, obtusae, perulis pluribus dense fulvescenti- 

 villosis. Folia pluria ad annum secundum persistentia, chartacea, partim fascicu- 

 lata, supra glaucescenti-viridia, initio pilis minutis sparse conspersa, demum 

 glabra, venarum reticulo leviter impresso, subtus glauca, sub lente papillosa, laxe, 

 ad nervos densius villosa, ea turionum ovata v. fere rotundata, basi rotundata, 

 v. ovalia et basi late cuneata, obtusiuscula, inaequaliter v. fere dupliciter crenato- 

 serrata, 1.5-2 cm. longa et 1.2-2 cm. lata, ea fasciculorum obovata v. obovato- 

 oblonga, basi cuneata, obtusa v. acutiuscula, apicem versus sparse crenato-serrata 

 V. minora fere Integra, 2-15 mm. longa et 4-8 mm. lata, venis utrinsecus 2-3; pe- 

 tioli villosi 1-2 mm. longi v. fere nuUi. Umbcllae 5-8-florae, sessiles, basi foliis 

 fasciculatis parvis circumdatis et partim folio persistenti suffultae, numerosissimae 

 et approximatae secus ramos virgatos; pedicelli 3-6 mm. longi, sparse villosi v. 

 fere glabri; calyx extus glaber, tubus intus villosulus, calycis dentes ovato-triangu- 

 lares, obtusi v. acuminulati, extus glabri, intus villosuli; petala rotundato-obovata, 

 brevissime unguiculata, alba, 2 mm. diam.; stamina circa 20, petalis dimidio bre- 

 viora; carpidia glabra; styli etaminibua paullo breviores. Fructus calycis dentibua 



