234 Rhodora [OCTOBER 
Northern Railway, Calais, 14 July 1900, Blankinship; field, 1370 m., 
Glacier National Park, Teton Co., 22-28 July 1913, Hunnewell 2063 
(hb. Hunnewell). SASKATCHEWAN: 1857-58, Bourgeau (distr. as P. 
aviculare var. latifolium). 
Like its nearest relative, Polygonum erectum L., the present species, 
although pretty certainly indigenous in the United States, has ap- 
parently never been found in a clearly native condition. It is very 
distinct from P. erectum not only in the form and cutting of its calyx 
but also in the strongly bluish-green tint of the entire plant, the very 
round-tipped elliptic leaves, and the conspicuous persistent lucid- 
scarious not fibrillose crowded ocreae. Much more collecting must 
be done before the exact range and abundance of the species can be 
ascertained. 
Potyconum allocarpum, sp. nov. Annuum adscendens vel sub- 
adscendens e basi ramosum ramis usque ad 5 dm. longis et ultra, 
cyaneo- vel luteo- vel rubescenti-viride non glaucum siccitate non 
obscurans. Caulis validus foliosus striatus internodiis inferioribus 
2-4.5 cm. longis quam folia saepissime brevioribus. Folia caulina 
ovalia vel oblongo-ovalia utroque acuta vel acutiuscula tenuia plana 
subvenosa (venis lateralibus validioribus 4-7-jugis) 2.5-5.5 cm. 
longa 1.1-2.1 cm. lata, superiora et ramulina reducta, in petiolis sub- 
marginatis 2-5 mm. longis. Ocreae scariosae tenuiter ca. 10-nerviae 
7-10 mm. longae mox valde laceratae plus minusve persistentes. 
Flores 1-3-ni in axillis mediis et superioribus, pedicellis inclusis. 
Calyx frugifer 3.7-4.5 mm. longus 5-lobatus, lobis oblongis apice 
rotundatis herbaceis margine petaloideo albido vel rosaceo-tincto 
conspicuo sed vix lato, costa distincta et (exterioribus) saepe nervis 
paucis lateralibus praeditis. Achenia exserta vel inclusa obscure 
olivaceo-castanea rare olivacea trigona saepius plano-convexa lateri- 
bus 2 angustioribus plus minusve concavis saepius inaequalibus 
rarius subaequilateraliter trigona lucida laevia 3.5-4.8 mm. longa 
2.5-3 mm. lata. Stamina 5. 
Annual, ascending or subascending, branched from the base, the 
branches up to 5 dm. long or more, bluish-, yellowish- or reddish-green, 
not darkening in drying, not glaucous. Stem stout, leafy, striate, 
the lower internodes 2-4.5 cm. long, usually exceeded by the leaves. 
Leaves oval or oblong-oval, acute or acutish at both ends, thin, flat, 
subvenose (lateral veins 4-7 pairs), 2.5-5.5 cm. long, 1.1-2.1 cm. wide, 
on submargined petioles 2-5 mm. long, the upper and the branch- 
leaves smaller. Ocreae scarious, weakly about 10-nerved, soon 
strongly lacerate, more or less persistent, 7-10 mm. long. Flowers 
in clusters of 1-3 in the middle and upper axils, on included pedicels. 
Fruiting calyx 3.7-4.5 mm. long, 5-lobed, the lobes oblong, rounded 
at apex, herbaceous with petaloid whitish or rosy-tinged conspicuous 
