274 RYDBERG: SOME GENERIC SEGREGATIONS 
structure of the fruit they are so unlike the rest of the species. 
The segregated genera would be distinguished as follows : 
Styles club-shaped ; stigmas slightly 2-lobed; receptacle flat; shrubs, unarmed, with 
shreddy bark and digitately ribbed maple-like leaves, 
Drupelets capped by hard hairy cushions ; styles glabrous ; erect shrubs. Ruédacer. 
Drupelets without cushions ; styles hairy ; prostrate or reclining vines. Oveodbatus. 
Styles filiform, glabrous ; stigmas usually capitate ; receptacle hemispherical, conical or 
nipple-shaped ; drupelets without cushions; leaves in most species pinnate and 
stem in most prickly. Rubus. 
Rubacer gen. nov. 
Unarmed shrubs with more or less shreddy bark, more or less 
glandular above. Leaves petioled, simple, digitately ribbed and 
lobed, with acute or acuminate lobes and cordate bases, resem- 
bling the leaves of certain maples. Flowers showy, in small 
panicles: sepals ovate with long slender acuminations: petals pink 
or white, oval or rounded: pistils numerous: receptacle flat or 
nearly so: drupelets numerous, capped with a dry, rather hard, 
finely and densely pubescent cushion with the club-shaped style 
attached under the margin. 
The type is the first species cited below. 
1. Rubacer odoratum (L.); Audus odoratus L. Sp. Pl. 494. 1753. 
2. Rubacer parviflorum (Nutt.); Rudus parviflorus Nutt. Genera 
I: 308. 1818; Rudus Nutkanus Moc.; Seringe, DC. Prodr. 
a) $06. 3625. 
3. Rubacer tomentosum; Audbus velutinus Hook. & Arn. Bot. 
Beechey Voy. 140. 1841; Not Vest. 1823. 
4. Rubacer Columbianum (Millsp.); Ruéus odoratus var. Colum- 
bianus Millsp. Bull. W. Va. Agr. Exp. Sta. 2: 355. 1892. 
Oreobatus gen. nov. 
Prostrate or reclining shrubby vines with light colored, shreddy 
bark. Leaves petioled, simple, maple- or gooseberry-like, digi- 
tately ribbed and lobed with rounded serrate lobes. Flowers 
showy, usually solitary: sepals ovate or ovate-lanceolate, acumi- 
nate or the tips foliaceous, in fruit erect: petals white, 1.5—3 cm. 
long, broadly obovate: stamens very numerous, hiding the fewer 
pistils: receptacle flat or nearly so: styles club-shaped, curved ; 
stigma somewhat 2-lobed ; young fruit apparently very pubescent, 
owing to the hairy styles: drupelets not very fleshy, without hairy 
cushions. 
The first of the following two species is regarded as the type : 
tight oo, e Sales 
