len 
Pe aviculare Le Knotweed. Annual or perennial, stems more or less ‘ 
prostrate ,»branching freely, , “the “nod net 
spicuous, leaves commonly 1-2 cm. long, oblong, enryingeee- lanceolate or oblanceo- - 
late, acute or obtuse, narrowed at the base, glabrous, witiews bluish gree ii, 
a me *P petioles 1-2 mm. long; ocrese 2-4 mn. 
long, silvery-white,,, and conspicuous when fresh, é-parted, becoming fringed in 
age; flowers whitisa, in axillary clusters of 3-5, perianth 
migdileyehen segments oblong, obtuse; stamens varying from 5-8, included, the 
style minute, 5-cleft; achene £-2.5 mm. long, ovoid, S-angled, brown. 
A common weed along roadways and in waste places. Introduced from Europe. 
Leaves often hoary due to the mycelium of a <ymeae, funguse 
6. 
“ - 
—. Pe. mini Wats. Low annual 10-15 cm tall, branching from the base, 
the stems ascending, or frequently unbranched; leaves commonly 1-165 cm. long, 
ovate, Oval or obovate, obtuse but Slightly mucronate, narrowed at=thexnkesp to a 
petiole 1-2 mm. long, glabrous on both surfaces, but lit reduced the x 
axils; ocreae funnelform, 2-3 mm. long, oblique, more or loss lacerate; flowers 
in small axillary clusters ; perianth greenish 
with white margins or somewhat rosy, 1.5-2 mm. long, 5-cleft to near the base, 
the segments obtuse; stamens varying from 5-8, included’ style minute, 3-cleft; 
achene < mm. long, Seangled , elliptical, black and Shining. 
Dry gravelly soil in burns or outcrops; throughout our region but very 
local. 
2 Pe Spergulariaeforme Meissner. 
the base, or nearly simple, emane 
puberulent and rather scurfy, leaves Commonly 1-2 cm 
lanceolate, 1-2 MMe Wide, acute, Sessile; ocreae closel 
£-cleft, the lobes very acute; flowers in smal] axilla 
the scale like upper leaves, perianth 4-5 mn. long, 
to the base, the segments oblong, with a prominent p 
at the base; stamens 5-8, included; Style S-parted, 
long, Jmangled, black and Shining. 
Annual , commonly much branched from 
» 10-25 om. tall, minutely 
y Sheathing, 6-8 mm. long, 
ty Clusters in the axils of 
inkish vein which is thickened 
Binute; achene @lliptical, 3-4 mn. 
(P. Coarc ta tun Dougl., P. ma jus Piper). 
Dry gravelly soil in burns and outcrops. 
8. Pe. Douglasii Greene. Annual, erect, branching from the base, 30-40 
OMe tall, the stems slender; leaves 2-5 cm. long, glabrous, Commonly narrowly 
oblong-lanceolate, 5-6 mm. broad, weekie- acute, votibinsher rips acute or 
acuminate at the base and nearly sessile, the upper sreatly reduced; ocreae 
cylindrical, rather closely sheathing, about 1 em. long, c-cleft above, the lobes 
very Slender and sharp, often becoming lacerate; flowers in Smll clusters in the 
axils of the much reduced scale-like upper leaves, frequently solitary; perianth 
S-parted nearly to the base, the segments 3-5 m, long, greenish toward the base, 
oblong, blunt, with more or less scarious margins, the outer pinnately veined, the 
midvein thickened, on pedicels 1-2 mn. long,soon Strongly reflexed; stamens Si 
included, the style minute, C-ported:; achone 3-4 mn. lon:, J-angled, élliptical, 
black and shining. (Fe tenue anselm: +. Douglasii var. latifoliun Greene}. 
6000 feet or more. Variable in size ané foliage, the var. latifoliun being 
4 stray 4 _ > mntiata+. 
merely a broad-leavea form of moiste: 
Dry gravelly soil throu nowt our region, ranging from 2500 feet or less to 
Z 
IASTAN 
J Vb @ 
e long, linear-ablong or lineangy 
white, campanulate, 5-cleft nearly 
7s nee ue 
aa 
