200 JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



posUls donsis 2-3 em. diarn. et raiuulos adscendenles 7-13 cm. longos ter- 

 ininantihus; pedunculi pedicellkiue et receptaciilnin ar'oumbcnli-i)ilosula; 

 raniuli 2 3 inferlorcs bracleani foliaceani supra ];asin vol circa medium 

 gerentcs; scpalatriatigularai, acutiuscula, mucronulatn, 1 mm. lon^a, ^labres- 

 cenlia; pclala sulK)rI>icidaria, 1.5 mm. longa; stamina val;lc iuaequalia, 

 breviora ])rta]a sul)ac([uaut!a, longiora ad 4 mm. longa; discus irrcgulariter 

 crenulalus; recei)taculuni intus nunute sericeo-jnihcsccns; car})clla basi 

 tantum et ad ventrcm sparse pilosuUi; stylisepalapa'dosaperanles: follicula 

 matu.ra desiderantnr. 



China. Yunnan bor.-occ: circa Pe-ycu-tsin, in silvis Tie-so, Jun. 

 22, 1!)1(>, Simeon Ten (No. IGo). 



This species seems most closely related to S. vacciniifolia D. Don which 

 differs chiefly in tlie densely villous inner bud-scales of tlie winter-buds, 

 hi the slenderer petioles, in the entire or crenately serrate leaves and in the 

 larger and looser (Unisely villous inflorescence. It also resembles S, hclla 

 Sims, but that sp(M*ies is at once distinguished I)y its dioecious floAvers. 



Spiraea vlrginiana l?ritt. var. serrulata, var, nov. 



A typo recedit foliis majoril>us et latioribus ellii)tico-oblongis 4-7 cm. 

 longis et 1.5-3 cm. hdis ])leris{iue supra mediiuu serrulatis, rariu.s versus 

 apicen) tantn.m pauci-serndatis, coryndjis 5-13 cm. latis. 



Ni)UTU Carolixa. Macon County: Frankhn, on river bank, July 2, 

 1919, T. G. Harbison (Xo. 208, type; shrub 2 m. tall); banks of Little 

 Tennesse*^ River, same date and same collector (Xo. 200; a straggling much- 

 branched slirub with flowering wands 1.25 m. long). 



Tiiis new variety on account of its larger and I)roader leaves serrulate 

 above the mid.dle ami of the large inflorescence looks quite distinct from 

 tyj^ical S. virginiana, but in all other characters it agrees witli tlie type. A 

 specimen from lUuicombc County collected by T. G. Harbison on the same 

 date is iniermediate betwt^en tlie type and the variety. 



Holodiscus franclscanus, cond). nov. — Sericolheca franci^scana Rydberg 

 in X. An). Fl. xxu. 2(i<S (1008). 



This species is certainly very closely related to //. discolor Maximowicz 

 and may possibly be a \ariety of that species, but the firmer texture of the 

 usually narrower lea\es, less deeply toothed and nuiic often with simple 

 teeth and tlie short, triangular-ovate and acute sej)als serve to distinguish 

 it from 77. discolor. 



The numerous species descrit)ed are often difficult to distinguish on 

 account of the occurrence of intermediate forms; of llictse I have seen I am 

 unable to separate si)ecifically Sericolheca ohovala Rydljerg from 77, gla- 

 hresecns (Greene) Heller, and Sericolheca concohr Rydberg from 77. micro- 

 phylla H\'dberg. 



Pyracantha discolor, sp. nov. 



Frutex 1.5-3 m. altus; ranmli juniores fulvo-tomentosi, annotini et vctus- 

 tiores glabri et fusco-purpurei-lucidi, interdum in s]>inas circa 1 cm. longas 

 mutati: folia ovalia vel elliptica vel oblonga, obtusa, rarius acuta vel emar- 



