206 JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



costam dilatatam planam attingentibus et canaliculos duos clausos pilis 

 ramosis albidis repletos formantihus. Flores in apice ramuloruin 1-3 vel 

 in racemis 5-floris; pedicelli 2-5 mm. longi, dense canescenti-puberuH; 

 sepala triangularia, 4 mm. longa, late lanceolata, in fructii ovata, extus 

 intusque tomentella ut tubus calycis; petala late obovata, unguiculata, 

 apice rotundata, erosa, 7-8 mm. longa et 5 mm. lata; stamina sepalis bre- 

 viora, dentibus filamentorum antheras superantibus, antheris 2 mm. longis, 

 apice in appendicem subulatam fere 0.5 mm. longam productis; styli 

 pilosuli, stamina subaequantes. Capsula ovoidea stylis persistentibus 

 exceptis circiter 8 mm. longa, sepalis persistentibus reflexis paulo supra 

 basin circumcincta. 



Mexico 



Madre i 

 Arboret 



This new species is well characterized by its coriaceous linear leaves 

 which show a peculiar structure; the margins are strongly recurved and 

 touching the broad flattened midrib they form two closed canals filled witli 

 a dense white mass consisting of short, much and irregularly branched 

 hairs similar to those of F. WrigJitii; these hairs are not visible from the 

 outside and only a cross-section reveals their presence as well as a well- 

 developed continuous hypoderm under the epidermis of the whole upper 

 surface and that of the midrib below. The flowers are smaller tlian in the 

 two preceding species and borne usually in clusters of 3 or 5 at the end of 

 the branchlets which are longer and not so regularly arranged as in the other 

 species; the petals are roundish-obovate, not rhombic, the anthers smaller 

 with a slender rather large appendage. This species marks the southern 

 Ijmit of the range of the genus. 



Deutzia Thunb. 



Deutzia scabra Thunberg. 



The name D. scabra has been applied by different botanists to three dif- 

 ferent species; by some It has been identified with D. creimta Siebold & 

 Zuccarini, by others with D, Sieboldiana Koernicke and by Maximowicz it 

 was applied to a form named below D. heterotricha. Apparently none of 

 the autliors who dealt with this species has seen Thunberg's types, though 

 Koernicke (in Gartenfl. xvi. 75) and Voss (in Garienfl. xlv. 354) state 

 that they had seen original specimens of Thunberg's from the herbarium 

 at Stocklxohn, but as Thunberg's types are in Upsala, they could have 

 seen only duplicates. The only way to solve the question seemed to be to 

 get definite information about the specimens in Thunberg's herbarium of 

 which there are three (see Juel, PL Thunberg. 290 [1918]). I therefore 

 wrote to Professor Juel sending him leaves of the different species for 

 comparison. Professor Juel very obligingly sent me detailed notes on the 

 specimens accompanied by excellent photographs, which enal>led me to 

 determine the three specimens designated as a, p, and y. The specimen 

 designated as a consists of a flowering branch of D. SieboMianay )3 of a 

 flowering branch of D, crenata and y of a fruiting branch of the same species. 



