205 



Rhododendron Souliei, Fmnchei. 



A bush, attaining in a wild state a heiglit of 12 ft.; young 

 branclilets glandular and rather viscid- Leaves roundish-ovate 



mucron 



the base, 1^ to 3^ ins. long, 1 to 2^ ins. wide, glaucous (especially 

 beneath), glabrous; petiole -^ to 1 in. long, glandular when young. 

 Flowers about five or six in a terminal cluster. Corolla very 

 open, almost saucer-shaped, of a beautiful soft shade of rose, 

 2 to 2| ins. wide, five-lobed; calyx distinctly five-lobed, the lobes 

 oblong, blunt, ^ in. long, edged with minute glands; stamens 

 about ten, much shorter than the corolla is wide; style glandular* 

 This very pretty S2:)ecies flowered with Messrs. Veitch in 1909, 

 only five years after seeds had been sent borne by Wilson. It 

 flowered at Kew last May and a year previously, and is very 

 well marked by its shallow corolla and the row of tiny dark 

 glands regularly set on the exact margin of the calyx lobes. 

 Plants obtained from Messrs. Yeitch in 1908 are thriving very 

 well, , - . 



Rhododendron Williamsianum, Rehder 4' Wilson. 



This rhododendron, which was named and described last year 

 in Plantae Wilsoiiianae^ vol. i, p. 538, and of which Wilson sent^ 

 home seeds in 1909, has not yet flowered under cultivation. The 

 collector describes it as a pretty and distinct plant growing 4 to 

 6 ft. high. The young shoots are very slender, glaucous, and 

 rather thinly furnished with gland-tipped bristles. Leaves 

 orbicular to ovate, \ to 1^ ins. long and wide, apiculate, rounded 

 to cordate at the base, glaucous and rather conspicuously net- 

 veined beneath; petiole up to \ in. long, purplish when young and 

 glandular-bristly. Flowers three to five in a terminal cluster, 

 opening in June in a wild state. Corolla campanulate, five- 

 lobed, 1^ ins. long, 1^ ins. wide, glabrous, described as of a pale 

 rose and unspotted; calyx small, obscurely lobed and, like the 

 pedicels (which are f in, long) covered with glandular bristles; 

 stamens 10, with smooth filaments ; ovary glandular. 



Prom its allies, the closest of which are apparently R. Souliei 

 (easily distinguished by its larger calyx) and R. rotundifolium 

 (distinguished by its larger leaves and seven-lobed corolla), this 

 species differs most markedly in its slender, almost twiggy 

 branchlets, diffuse branching, and the glandular-bristly character 

 of its young shoots, petioles and pedicels. It was found by 

 Wilson in Western Szechuen at 9000 to 10,000 ft. altitude, and 

 will, in all probability, be hardy. 



XXXVI.-DECADES KEWENSES 



L 



Plantarum Novarum IN" HoRTi Eegii Coxservatum. 



DECAS LXXX. 



791. Dianthus (Caryophyllastrum) tenuis, F. N. Williaws 



[Caryophyllaceae] ; ajBinis D. iiitido, Waldst. et Kit., caule 

 unifloro, foliis patentibus, bracteis calycinis 5 mm. longis, floribus 

 albis odoratis, discrepans. 



