221 
R. rossicus. — Nova spec. 
Sect. Lapathum Campd. — Planta biennis, lu- 
tescens, nunc humilis, subsimplex, nunc elatior, 3 — 6 
dm. alta. Caulis glaberrimus vel parce papilloso-pubes- 
cens, statu sicco grosse furcato-striatus, interdum debilis, 
ima basi ramos elongatos floriferos emittens ; vulgo autem 
firmus, rigidus, stricte erectus, in inferiore tertia parte 
simplex, cæterum ramis floriferis instructus. Rami flori- 
feri paniculam ovato-pyramidatam formantes, patuli, 
arcuato-adscendentes, simplices vel inferiores ramulis 
paucis præditi, omnes, ut caulis, usque ad apicem foliati. 
Folia basilaria sat longe petiolata, ut caulina media 
subtus ad nervös et petiolum plerumque papilloso-pu- 
bescentia; lamina anguste oblongo-lanceolata, apice sub- 
obtusa, basi angustata vel rotundata, marginibus plana 
vel basin versus leviter undulato-crispa. Folia caulina 
media breviter petiolata vel subsessilia, anguste lanceo- 
lata (6 — 20 cm. longa, 0,5 — 2 cm. lata), apice acutius- 
cula, basi angustata, margine plana. Folia ramea lineari- 
lanceolata vel sublinearia, verticillastros multum supe- 
rantia. Verticillastri multiflori, valde approximati, in 
quoque ranio inflorescentiam spiciformem continuam vel 
basi tantum interruptam formantes. Pedicelli fructiferi 
rigiduli sed tenues, apice tantum incrassati, prope 
basin articulati, plurimi flore fructifero breviores, 
singuli tantum eo paulo longiores. Perigonii fructiferi 
phylla exteriora tenuia, submembranacea , brévia, 
marginibus basilaribus phyllorum interiorum adpressa, 
recta vel leviter retrorsum arcuata, numquam inun- 
guem prorsum curvatum producta. Perigonii fructi- 
feri phylla interior a (valvæ) e basi subcuneata anguste 
ovato-triangularia, acuta, in utroque margine den- 
tibus duobus, quorum alter brevis alter longior, vel 
haud raro dente singulo instructa, omnia callifera; 
dentes subuliformes, recti, basin versus vix dilatati, 
