VIOLA-STUDIER. 457 



furuished specimens, when applied to a few years ago, to enable a 

 comparison to be made. We should think the forma lutescens will 

 be found to be synonymous with one or other of the large yellow- 

 flowered species which M. Jordan has described, but we have not 

 seen a named plant at all approaching f. roseola Wittr. or subforma 

 eriibescens Wittr. 



The characters, also somewhat abridged, for the subspecies of 

 V. arvensis are as follows: — 



communis Wittr., nov. subspec. V. annua vel rarius biennis; 

 caulibus suberectis parcius ramosis ; lacinia terminali stipularum 

 lanceolato-ovata — lanceolata, parce creuata vel Integra ; pedunculis 

 (adultis) longioribus quam foliis, suberectis ; flore mediocri ; sepalis 

 plerumque paullo brevioribus quam petalis ; petalis supremis albidis 

 (raro in apice violaceo-maculatis) suberectis ; petalis mediis albidis, 

 striis nectareis stepe destitutis ; calcare appendicibus sepalorum 

 paullo longiore. 



sublilacimi Wittr., nov. subspec. V. annua (vel biennis?); 

 caulibus suberectis ; lacinia terminali stipularum lanceolata, Integra 

 vel parcissime crenata ; flore mediocri ; sepalis eadem longitudine 

 ac petalis vel his paullo longioribus ; petalis supremis lilacinis vel 

 violaceo-lilacinis, suberectis, obovatis ; striis nectarhs valde distinctis ; 

 collo pistilli subnutante, macula obscura ornato. 



patens Wittr., nov. subspec. V. annua vel rarius biennis; 

 ramis inferioribus non paucis, patentibus, subprocambentibus ; 

 lacinia terminali stipularum lanceolato-ovata — lanceolata; pedun- 

 culis eadem fere longitudine ac foliis, patentibus ; flore mediocri 

 vel majore ; sepalis magnis, longioribus quam petalis ; petalis omnibus 

 prorsus vergentibus, albidis ; striis nectareis ut in subspec. communi 

 Wittr. ; calcare appendicibus sepalorum paullo breviore. 



curtisepiila Wittr., nov. subspec. V. annua vel biennis ; cauli- 

 bus subprocumbentibus ; lacinia terminali stipularum foliorum 

 infimorum foliacea, ovata, crenata, superiorum ovato-Ianceolata vel 

 lanceolata ; flore majore ; sepalis tertia fere parte brevioribus quam 

 petalis; petalis supremis suberectis, latis, lamina obovata, totis stra- 

 mineis vel rarius ex parte superiore purpureo-violaceis ; petalo 

 infimo ochroleuco, striis nectariis 5-7, distinctis ; capite pistilli 

 magno. 



siriolata Wittr., nov. subspec. V. annua ; caulibus suberectis ; 

 lacinia terminali stipularum magna, foliacea, crenata, foliorum infi- 

 morum ovata, superiorum lanceolata ; flore minimo ; sepalis quarta 

 fere parte longioribus quam petalis ; petalis omnibus prorsus 

 vergentibus — corolla itaque semper fere semiclausa — adultis lila- 

 cinis longitudinaliter striolatis, quattuor supeiioribus striolis tertiis, 

 inferiore striolis quinque ; calcare appendicibus sepalorum paullulo 

 longiore ; capite pistilli a latere viso angasto ; orificio stigmatis 

 magno. 



The subspecies coinnnmis Wittr. bears considerable resemblance 

 to r. serjetalis .Jordan ; the latter has, however, the two upper petals 

 marked with violet blotches towards the summit, which is said to 

 be rarely the case in subspecies commiuiis, and there may be other 

 minor diflferences. 



