ROSACEAE. — SPIRAEA 443 



glabra, nervis utrinsecus 4-5 rectis in dentes exeuntibus; petioli 3-6 

 mm, longi, graciles, glabri. Inflorescentia umbellato-racemosa, 6-15- 

 flora, glabra, in apice ramulorum foliosorum plerumque brevium, 

 interdum elongatorum; pedicelli graciles, 5-12 mm., rarius ad 18 mm. 

 longi; calycis tubus late turbinatus, extus glaber, intus dense pilosus, 

 dentes late triangulares, acuti, extus glabri, intus tomentosi; petala 

 rotundata, 4 mm. diam.; stamina 40-50, petalis longiora; discus parvus, 

 annularis, crenulatus; carpidia glabra, in stylum 3 mm. longum atten- 

 uata. Fructus dentibus calycis reflexis; foUiculi exserti, intus apice 

 gibbosi, extus styluus subapicalem patenti-reflexum gerentes. 



Western Szech'uan: Fei-yueh-ling, Ching-chi Hsien, thickets, 

 alt. 2000-2300 m.. May 1908 (No. 2767, type); Chiu-ting-shan, thick- 

 ets, alt. 1500 m., May 22, 1908 (No. 2747). 



Spiraea laeta seems nearest related to S. flexuosa Fischer,^ which is easily dis- 

 tinguished by the pale yellowish-brown branchlets, the conspicuous disk, pubes- 

 cent ovaries, upright style borne on the inner side of the follicles, and by the 

 narrower simply serrate leaves. The allied S. anomala Batalin differs in the pu- 

 bescent ovaries and in the smaller leaves finely and closely serrate, scarcely incised 

 and truncate at the base. No. 2747 differs from the type in its larger leaves cu- 

 neate at the base, glabrous beneath and up to 4.5 cm. long, and in its longer pedicels. 



Spiraea laeta, var. tenuis Rehder, n. var. 



A typo recedit foliis minoribus ovatis v. late ovatis, 1-2 cm. longis 



1 Another new species closely allied to S. flexuosa Fischer is the following : 



Spiraea papillosa Rehder, n. sp. 



Frutex 2-3-metralis ramis virgatis; ramuli homotini annotinique glabri v. initio 

 sparse pilosi, flavido-brunnei v. purpureo-castanei, acute angulati, subalati; gemmae 

 ovoideae, obtusae, parvae, pubescentes, perulis exterioribus paucis imbricatis. 

 Folia (ea ramulorum floriferorum tantum vidi) papyracca, oblonga, acutav.breviter 

 acuminata, basi late cuneata, supra medium grosse serrata dentibus acuminulatis 

 utrinque 3-5, 3-4.5 cm. longa et 12-17 mm. lata, supra laete viridia, subtus glauca, 

 dense papillosa, tota facie sparse, ad nervos densius pilis subaccumbentibus seri- 

 ceis obtecta, nervis utrinsecus 3-4 supra leviter impressis subtus elcvatis; petioli 

 pubescentes, 2-3 mm. longi. Inflorescentia umbellato-racemosa, glabra, multi- 

 flora, in apice ramulorum patentium foliosorum, 5-10 cm. longorum; pedicelli 

 graciles, 1-1.5 cm. longi; flores albi, 1 cm. diam.; calycis tubus late turbinatus, 

 extus glaber, intus sparse pilosus, dentes late triangulares, acuminulati, extus 

 glabri, intus villosuli; petala rotundata, 4.5 mm. diam.; stamina 40-50, petalis 

 longiora; discus annularis, crenulatus; carpidia glabra, in stylum 4 mm. longum 

 attenuata. Fructus maturus desideratur. 



Szech'uan : valley of Tung river about 40 miles south-east of Tachien-lu, alt. 

 1300 m.. May 1904, E. H. Wilson (Veitch Exped. No. 3550). 



Closely allied to S. flexuosa Fischer which is easily distinguished by its glabrous 

 or nearly glabrous thinner leaves, not glaucous and papillose beneath, by the in- 

 florescence being borne on much shorter ascending branchlets and by the pubescent 

 ovaries. 



