CLETHRACEAE. 
Determined by Atrrep REmDER and E. H. WirLsoN. 
CLETHRA L. 
Clethra monostachya Rehder & Wilson, n. sp. 
Frutex v. arbor parva, 2-6 m. alta; ramuli hornotini initio stellato- 
pilosi, mox glabrescentes, purpureo-brunnei, annotini brunnei cortice 
solubili; gemmae elongatae, acutae, dense sericeo-villosae. Folia 
membranacea, ovato-lanceolata v. elliptico-lanceolata, rarius lanceo- 
lata, acuminata, basi cuneata, serrata dentibus adpressis mucronatis, 
8-14 cm. longa et 2.5-5 cm. lata, supra obscure viridia, glabra, subtus 
Pallidiora, in axillis venarum barbata ceterum glabra, costa media 
Supra impressa subtus elevata, nervis utrinsecus 10-16 subtus elevatis; 
petioli glabri, supra canaliculati, interdum leviter alati, 1-2.5 em. 
longi Racemi terminales solitarii, rarius 3, laxi, 15-20 em. longi, 
lateralibus fere dimidio minoribus, rhachis ut pedicelli stellato- 
tomentosa; pedicelli 5-8 mm. longi, bracteis lanceolatis caducis circiter 
5 mm. longis suffulti; sepala ovata, acuta, 2.5-3 mm. longa, extus 
dense villosa; petala oblonga v. ovali-oblonga, leviter concava, ob- 
tusa v. emarginata, 5-6 mm. longa, glabra; stamina petalis paullo 
longiora, filamentis basi dilatatis infra medium sparse villosis, an- 
theris fere 2 mm. longis; stylus staminibus paullo brevior infra apicem 
curvatus, adpresse pilosus apice excepto, stigmate 3-lobo; ovarium 
dense villosum, apice pilosum. Capsula nutans, subglobosa, circiter 
5 mm. diam., tomento cinereo-fusco obtecta, stylo persistente coro- 
Data, basi sepalis persistentibus adpressis suffulta; semina irregu- 
ter ovalia, circiter 1.5 mm. longa, flavo-brunnea, testa manifeste 
reticulata, 
Western Szech'uan: without precise locality, alt. 1600-2300 m., 
July 1903 (Veitch Exped. No. 3927, type); Mupin, woodlands, October 
1908 (No. 1192). 
;, This species is allied to Clethra Delaeayi Franchet which is described as hav- 
Mg cuneate-obovate leaves slightly scabrid above, solitary racemes, petals 8-12 
mm. long, obovate and ciliate and longer than the stamens. Clethra Fargestt 
Franchet is distingui chiefly by the leaves being less attenuate at the base, 
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