536 WILSON EXPEDITION TO CHINA 



lata, acuminata, basi cuneata, 7-11 cm. longa et 1.5-2.5 cm. lata, 

 supra glabra, maturitate leviter rugulosa, subtus tomento floccoso 

 lanuginoso albido vestita, costa media supra impressa subtus manifeste 

 elevata glabra, nervis utrinsecus 14-17 supra impressis interdum obso- 

 letis; petioli puberuli, mox glabri, 8-15 mm. longi. Flores umbellato- 

 racemosi, plures; rhachis circiter 1 cm. longa, pubescens; pedicelli laxe 

 ferrugineo-villosi et minute glandulosi, 1.5-2 cm. longi; calyx cupularis, 

 brevis, lobis 5 rotundatis latioribus quam longis extus sparse puberulis 

 et glandulosis; corolla 5-loba, late campanulata, 4-5 cm. longa et 

 lata, alba, maculata, lobis ovalibus apice rotundatis circiter 2 cm. 

 longis quam tubus intus in parte inferiore dense glandulosus paullo 

 brevioribus ; stamina circiter 10, inclusa, 2.5-3.5 cm. longa, filamentis 

 compressis basim versus glandulosis; ovarium anguste conicum, 7-8 

 mm. longum, tomento villoso flavido obtectum; stylus 4-5 cm. longus, 

 rectus, glaber basi sparse villoso glandulosoque excepto, stigmate 

 magno applanato. Capsula cylindrica, 2-2.5 cm. longa et 8-10 mm. 

 diam., 8-locularis, partim tomento rufo obtecta, glabrescens; semina 

 brunnea, ovoidea v. oblongo-ovoidea, compressa, circiter 2 mm. longa. 

 Western Szech'uan: west and near Wen-ch'uan Hsien, thickets, 

 alt. 2000-2600 m., July and October 1908 (No. 1198, type); same 

 locality, alt. 2600-3300 m., October 1910 (No. 4248); south-east of 

 Sungpan Ting, woods, alt. 3300 m., August 1910 (No. 4727). 



This species is related to R. floribundum Franchet, which is readily distinguished 

 by its much larger, subbullate, strongly veined leaves with the secondary veins 

 prominent below, and rather different, smaller flowers. Our material consists of 

 specimens with ripe fruit and old flowers; the color of the flowers is unknowTi, 

 but it is apparently white or nearly so. In the region where this species grows 

 Rhododendrons are called " Yang-ngo-hwa." 



It is fitting that the name of Hunnewell should be associated with a species of 

 Rhododendron, for two generations of this Massachusetts family have devoted 

 themselves to the cultivation of these plants in their gardens at Wellesley and have 

 lost no opportunity to increase the knowledge and advance the interests of American 

 horticulture. 



To this group also belong the two following species: 



Rhododendron Monbeigii Rehder & Wilson, n. sp. 



Frutex ramis validis, annotinis glabris. Folia tenuiter coriacea, oblanceolata 

 V. oblongo-lanceolata, acuta v. brevissime acuminata, basi sensim attenuata, 

 9-15 cm. longa et 3-4 cm. lata, supra glabra, obsolete rugulosa, subtus dense 

 tomento lanuginoso arete adpresso albido vestita, costa media supra impressa, 

 Bubtus elevata flavida, glabra v. fere glabra, nervis utrinsecus 12-15 supra leviter 

 V. vix impressis subtus leviter elevatis; petioli validi, circiter 1 cm. longi, glabri 

 V. fere glabri. Flores 10-12, umbellato-racemosi ; bracteae caducae, oblongae, 

 extus villosae, 1-1.5 cm. longae; pedicelli sparsissime pilosi v. fere glabri, 1.2- 

 1.5 cm. longi; calyx minimus, cupularis, lobis latis brevissimis acutis v. obtusis 



