54 JOURNAL OF THE ARNOLD ARBORETUM [vol. v 



biaristate as described by the authors, but the filaments have near the apex 



back of the anther-cells a pair of appendages in shape and size like those 



of P. ovalifolia. Of Pieris bract cat a W. W. Smith I have seen no specimens 



but from the statement "filamentis . . . apice biaristatis" I infer 



that it also belongs to Xolisma. Pie^° Forrestii Craib is a true Pieris 



and so is P. polita W. W. Smith & J. F. Jeffrey to which I refer one of 



Dunn's specimens collected in Fokien (Hongkong Herb. No. 2894). Of the 



numerous species of Pieris proposed by L£veill£ I have seen no material 



and his descriptions are too incomplete to be guided by them. But I 



may say that P. Bodinieri appears to be a true Pieris judging from his 



drawing (in his Cat. PI. Seutchouen, t. 24 [1918] ) and that his P. Henryi 



probably belongs to Xolisma viUosa; some of his species may not belong 



to the Andromedeae at all, but to Vaceinium as his P. coreana and P. 



Fauriei which according to Dr. Nakai who has seen the type specimens 



are both Vaceinium bracteatum, or they belong to other Ericaceous genera. 



The species of Xolisma may be divided into several well marked groups 

 as follows: 



Xolisma Raf. 

 Sect. I. Lyonia, comb. nov. 



Andromeda Walter, Fl. Car. 137 (1788), as to A. fcrruginea. 



Lyonia Nuttall, (Ion. i. 2f>(> (1818), in part; not Rafinesque (1S0S) nor Elliott 



(1817). 

 Xolisma Rafinesque in Am. Month. Mag. iv. 193 (1819). 

 Lymiia sect. 1. Bentham & Hooker, Gen. PL it. 588 (1876). 

 Andromeda sect. 5. Lyonia Gray. Syn. Fl. n. pt. i. 32 (1878). 

 Lyonia Subgen. 3. Eulyonia K. Koch, Dendr. n. pt. I. 11!) (1872), in part. — 



Drude in Engler & Prantl, Nat. Pflanzenfam. iv. abt. i. 4 1 (1889). 

 This section, the type of which is Lyonia ferruginea Nuttall = X.fer- 



ruginca A. Heller, is characterized by the flowers being borne in dense 

 axillary panicles, by the unappendaged filaments and the lepidote indu- 

 mentum; the leaves are persistent and often toothed or undulate; the 

 capsule is usually ovoid, prominently angled and the thickened part of 

 the sutures separates as a whole from the rest of the capsule. Its many 

 species (24 being enumerated by Small in N. Am. Fl. xxix. 65-72), are 

 mostly natives of the West Indies; two occurring in the southeastern United 

 States and a few in Mexico. 



Sect. II. Arsenococcus, sect. nov. 



Vaceinium Linnaeus, Spec. 351 (1753), as to V. ligustrinum. 

 Andromeda Lamarck, Encycl. M6th. i. 158 (1883), as to A. raremosa. 

 Lyonia Nuttall, Gen. i. 2(ii) (1818). in part, exel, species typica. 

 Andromeda sect. Lyonia Gray, Man. 2(15 (1848); Syn. Fl. n. pt, i. 32 (187S), 

 in part. 



.Lyonia Subgen. Eulyonia K. Koch, Dendr. n. pt. I. 110 (1872), in part. 

 Lyonia sect. 2. Bentham & Hooker, Gen. PL 588 (1876). 



Arsenococcus Small in Small & Carter, Fl. Lancaster Co. 218 (1913). 



This section, the type of which is Vaceinium ligustrinum L. =X. ligustrina 

 Rehd., is characterized chiefly by its flowers being borne in terminal pani- 

 cles, by the unappendaged filaments, the absence of the lepidote indu- 

 mentum, by the depressed-globose capsule not prominently angled and 



