19G JOURNAL OF THE ARNOLD ARBORETUM [vol. i 



3-5 mm. lon^n, pubesccnies; calycis lobi ovati acuminati, extus ut tubus 

 sat dense accumbenti-pilosi, intus apice exccpto glabri, tubuni paulo super- 

 antes; pelala ovalia, 1.8-2 cm. longa, leviter erosa; stylus 7 mm, longus, 

 staminibus longioribus brevior, apice tantum quarta parte divisus, glaber; 

 stigmata parva, antheris l)reviora et angustiora. 



Japan-. Prov. Musasi, Chicliibu, June 30, 1910, sine collectore (sub 

 nomine P. coronarnis var. scitzumi). 



llus species seer 



latifoUus Schrader) 



P. fuhescens Loiseleur (P. 



s larger, ovate, acuminate 



leaves usually rounded at the base, and dentate or denticulate, in the 

 style usually divided to tlic middle and in the larger stigmas. It is appa- 

 rently a rare species, as I have seen only one specimen and no Japanese 

 botanist seems to have noticed this species which differs from all other 

 Japanese riiiladelphus in its pubescent calyx. 



Philadelphus Gordonianus var. columbianus, comb. nov. — P, Gor- 



if< 



P, ore- 



ganus Nuttall ex Torrey & Gray, F. N. Am. i. 595 (1840), pro synon.; 

 secundum Rydberg in Fl. N. Am. Fl. xxn. IGC (1905).— P. Californicus 

 hort. ex K. Koch, Dcndr. i. 341 (l8G9), pro synon. — P. coliimhiamis 

 Koehne in Gartenfl. xuv. 542 (189G). — Rydberg in N. Am. Fl. xxii. 1G6 

 (1905). 



This variety differs from the type chiefly in its smaller leaves, those of the 

 shoots with few coarse teeth, and in its smaller flower. As f lie first varietal 

 name given by Dippel is a misapplied name being based on P. californicus 

 hort., not Benth. and therefore not valid, a new combination is necessary. 



Philadelphus subcanus Koehne var. Wilsonii, comb. nov. — P. Wil 

 sonii Koehne in Sargent, PI. Wilson, i. 4 (1911), 145 (1912). 



This variety differs from the type only in its larger leaves, somewhat 

 more reticulate beneath and in the larger inflorescence, and I cannot con- 

 sider it specifically distinct from P. subcanus. Plants raised from seed of 

 No. 4384 do not yet differ at all from P. siibcamiSy but they have not flow- 

 ered herc.^ 



Philadelphus Delavayi L. Henry var. calvescens Rehder, var. nov. 

 A typo rcccdit foliis subtus glaucesccntibus et tantum ad costam ner- 

 vosque strigosis vel interdum fere glabiis. 



China. Yunnan: in collilms prope Licliiang, versus occ, alt. 2900 m., 



1^ This and the two following species I refer to a new wxll-charactcrized group restricted to 

 Chnia which I place between the groups Gordoniani Koehne and"Coronarii Km^hne. It may 

 be briefly described as follows: 



Scr. Sericanthi Rehd., ser. nov. Cortex ramuloruni bninneus, horizontalitcr fissus, dcmun 

 plus minusve cxfolians: folia sorrato-deuticulatadentlbuspronis, nunquam Integra, subtus plus 

 mInusvepubescentIa,raroglal)ra: florcs subcampanulati in racemis 7-11-floris secundls; calyx 

 plcrunique pubcscens vel glaber et violaceo-purpiiracens; stylus staminibus brevoir; stigmata 

 antheris angustiora. — To this group the type of which is P. sericanfhus Koehne belong be- 

 sides the species mentione<l the following: P. Magdalenae Koehne, P. purpurasccns Rehd. 

 and P. venuslus Koehne. It is chiefly characterized by the denticulate-strrate leaves with 

 the teeth pointing forward and by the nodding subcanipanulate flowers. 



