1920] REHDER, NEW SPECIES. VARIETIES AND COMBINATIONS 125 



S-folioIata; foliola subsessilla vel fere rhombico-elliptica vel ovato-elliptica, 

 apice brevissime acuminata vel acutiuscula et mucronata, basi cuneata, 

 2-4 cm. longa et 1-2.5 cm, lata, margine dentibus plerisque grossis 1-7 in- 

 stracta vel praecipue in ramulis floriferis pleraque Integra, crassiuscula, 

 supra rugulosa et saturate viridia, subtus pallide viridia, utrinque lucidula, 

 costa media utrinque leviter elevata, venis venulisque supra impressis 

 subtus vix elevatis sed colore distinctis; petioli 1*2.5 cm. vel rarius 3-4 cm. 

 longi, Umbellae in ramulis elongatis termmales, 4-7, centrali majore, 

 rarius solitariae, multiflorae, pedunculatae pedunculis 1-1.5 cm. longis; 

 pedicelli graciles, 5 mm. longi, fructiferi 1 cm. longi; calycis lobi triangulares, 

 minutissimi; petala ovata, acuta vel acuminulata, 2 mm. longi, intus 

 viridi-albi, extus rubescentes; filamenta 1.75 mm. longi; antherae albidae, 

 ovalia, 1 mm. longae; styli duo, sub anthesi erecti, 0.5 mm. longi, distincti, 

 in fructu patentes, leviter curvati, 1.5 mm. longi. Fructus suborbiculatus, 

 valde compressus, 6-7 mm. diam., 3 mm, crassus, nigro-purpureus, dis- 

 permus, margine calycis et stylis leviter recurvatis coronatus. 



China. Yunnan: mountains near Tsin-kon, on the Mekong River, at high 

 altitude, 1905, AbhS Monheig (seed sent to M. Maurice L. de Vilmorin who sent in 

 1911 a plant under No. 4280 to the Arnold Arboretum); specimens from this plant 

 collected October 13, 1917, October 14 and 20, 1918 and October 13, 1919 are pre- 

 served in the herbarium of the Arnold Arboretum. 



This new species seems to be most closely related to A, trifoliatus Voss 

 {A. aculeatus Witte), whicb is easily distinguished by the hooked spines, the 

 larger, petioluled, sometimes prickly leaflets, the mucb longer and slenderer 

 peduncles and pedicels, by the styles being connate to the middle and by 

 the less compressed fruit. It has also some resemblance to A, spinosus 

 Miquel, but that species has 5-foliolate leaves and solitary umbels on short 

 lateral spurs. 



The plant which was received from M. Maurice de Vilmorin in 1911 has 

 grown into a round-headed bush with upright stems and is now about 2 

 meters tall. It has proved perfectly hardy at the Arnold Arboretum; the 

 flowers do not open until the beginning of October and the fruits begin 

 to ripen at the end of the same month and are produced only on the central 

 umbel which blooms about two weeks earlier than the lateral umbels. The 

 leaves remain on the branches without change until severe frost sets in 

 in November. The shrub has no special claim to ornamental value except 

 in its dark green, long-persisting leaves which have never suffered from in- 

 sects or diseases. 



CAPRIFOLIACEAE 



X Viburnum Jackii, hybr. no v. ( V, Leniago X prumfolium). 



Frutex altus, ramis gracilibus erecto-patentibus comam rotundam satis 

 densam formantibus; ramuli juniores sparse lepidoto-glandulosi, annotini 

 brunneo-grisei, vetustiores brunnei; gemmae floriferae late ellipsoidales et 

 in rostrum obtusum productae, 0.8-1.2 cm. longae, fuscae, cinereo-lepidotae, 

 foliiferae anguste oblongae, minores. Folia late vel orbiculari-elliptica ad 

 ovata vel elliptica, breviter acuminata, basi late cuneata vel fere rotundata, 



