664 ON SECTION AVICULARIA OF THE GENUS POLYGONUM. 
1. P. BOLANDERI, Brewer, Proc. Am er. Acad., viii, 400. — Stems erect, very slender, 
6-15’ high, nearly naked, with short s Pa densely ise afy branches above; leaves nar- 
rowly linear, 2-4"’ long, often cuspidate; agais about equalling the leaves, finely lac- 
erate; flowers eapi ‘solitary, =i r — light rose-color; styles half as long as the 
Cal 
, 
apaa Brewer, l. a es ate or agora ste the branches 2-6’ long, usu- 
i o 
m o 3 
flowers 1-3 in the a Bem of the leaves, which crowd the ends of the branches, deep 
rose-color, 14-24" long on exserted pedicels; styles much shorter than the ovary.— 
the Sierra Nevada, California. 
Sark. ONYCHIA, Cham. and praon — iane the branching stems 1-3° long; 
leaves ara iT long, acu he margins revolute; flowers densely 
crowded at the ends of the branches, roee soar: w long; styles as long as the ovary. 
— On the seooast i from San Francisco to Puget Sound. 
4. P. MARITIMUM, L.— Prostrate, glaucous, stems }4-1}° long, very shortly pane 
e oval to ined, 3- 3-10'' long; towe era 1-14" 20n ng, on mos sid exserted ped 
lightly On the seacoast from Mas 
sachusetts to Georgia; danii annual in the more northern ‘aanites: ust distinguish- 
able from the Old World specie 
* * Annuals, h striate stems leafy ele calyx colored upon the margins, 
becoming tae OT styles 
5. P. AVICULARE, L.— Mostly BRONIE or ascending, a re bluish-green, the 
parr slender aioe di ongated; leaves oblong to lanceolate, 3-10" long, usually acute 
acutish; flowers rarely 1’’ long, pinkish-white, the pedicels pi exserted, stamens 
i or rarely 5; achenium broadly eras: 1'' long or less, dull kass minutely granular. 
pores about yards and PR probably not indigeno 
<P. it erect or a sieme glabrous, ap high or more, yellow- . 
gn: leaves oblong o -or oval, pok long, usually obtuse; flowers mri 14” long, often 
yellowish, on m r less exserted pedicels; xia rarely 6; stamens 5-6; achenium 
broadly ovate to prad eolate, dull and granular or apro corm From the — 
Tn and Canada to Nevada and Oregon; a strictly Am 
P. peee sinha saat Rep., v, 315 — Baunir seabrons-puberaent wr 
ver ee decuin bent E eepending;. 6-15’ long (or an alpine form, very dw 
and often psoas leayes ae “ lanceolate, 2-8’ long, sie at each er 
ae cea cusp oon pot in all the axils, 1'’ long or arep less, light rose- 
dai bä cals slender ye pedicels; stamens 8; styles short; achenium smooth 
and shining, exceeding oP —In Oregon (Pickering, <a Hall), and in the Wah- 
ga and Uintas at EN Pe feet altitude. 
. P. TORREYI.— Closely resembling the last, but perfectly smooth; the 
oats near ce ends of the branches and nearly sessile in os axils of the septs 
leaves; stamens 6; achenium considerably exceeding the calyx.— Collected by Dr. 
Torrey in the Tain ite valley. 
* + * Annuals with striate stems, the branches slender and virgate, angular; leaves 
diminishing upward and becoming bractlike, the spikelike inflorescence more or 
pted. 
Megh nterru 
. RAMOSISSIMUM, Michx.— Erect or ascending, 2-4° high, geot yellowish; 
leaves anette to linear, 1-24’ long, sorted flowers and achenium as in P. erectum, but 
sepals m ore frequently 6, the stame ns and kot — mostly omer ‘and 
shining 
. P. TENUE, Minh eres, ape Migh, glabrous o or “rarely slightly scabrous a the 
dete: leaves linear ong te. ob- 
rved ; flowers paar sollte ary, 1-2" "long, ara in riper the sepals gA 
nk; stamens sd A mar ch shorter than ovary; achenium ovate, 
ny.— Fr C wes parte Oregon ar. LATIFO- 
LIUM, Et has broader leaves and more numerous flowers; Var: MICROSPERMUM, 
_ Engelm, is a low slender form, with sls ais oni ait perhaps distinct; poth 
