Aconogonon phytolaccifolium

(Meisner ex Small) Small in P. A. Rydberg

in P. A. Rydberg, Fl. Rocky Mts., 1061. 1917.

Common names: Poke knotweed
Endemic
Basionyms: Polygonum phytolaccifolium Meisner ex Small Bull. Torrey Bot. Club 19: 360. 1892
Treatment appears in FNA Volume 5. Treatment on page 599. Mentioned on page 598.

Plants (50–) 70–150 (–200) cm. Stems erect, glabrous or pubescent. Leaves: ocrea reddish-brown, funnelform, 1–3 cm, margins oblique, glabrous or pubescent; petiole 5–20 mm; blade lanceolate to ovatelanceolate, 5–15 (–19) × 1.4–7.5 cm, not subcoriaceous, base rounded, margins entire, usually scabrous to ciliate, rarely glabrous, apex obtuse to acuminate, faces not glaucous, glabrous or densely pubescent. Inflorescences usually terminal, subterminal, and axillary, paniclelike; peduncle 0.5–12 cm, glabrous or pubescent. Pedicels 0.9–4 mm. Flowers 1–3 per ocreate fascicle, rarely some flowers with stamens poorly developed; perianth white to greenish white, 2.5–3.5 mm; tepals slightly dimorphic, ovate to obovate, apex obtuse; anthers yellow to pink. Achenes usually exserted, yellowish-brown, not beaked distally, (3–) 3.8–7 × 2.3–4.8 mm, shiny, faces concave.

Distribution

V5 1218-distribution-map.gif

Calif., Idaho, Mont., Nev., Oreg., Wash.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Stems glabrescent or pubescent; leaf blade margins scabrous to ciliate Aconogonon phytolaccifolium var. phytolaccifolium
1 Stems glabrous; leaf blade margins glabrous Aconogonon phytolaccifolium var. glabrum

"/2" is not declared as a valid unit of measurement for this property.

0.3 cm3 mm <br />0.003 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
yellowish-brown +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
3-gonous +
2.3mm;4.8mm +
yellow +  and pink +
ovate +  and elliptic +
Harold R. Hinds† +  and Craig C. Freeman +
(Meisner ex Small) Small in P. A. Rydberg +
rounded +
Polygonum phytolaccifolium +
15 cm150 mm <br />0.15 m <br /> (19 cm190 mm <br />0.19 m <br />) +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
lanceolate;ovatelanceolate +
not subcoriaceous +
1.4cm;7.5cm +
foliaceous +  and perfoliate +
scale-like +
just below the soil surface or and above the soil surface +  and spreading +
Poke knotweed +
Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +  and Wash. +
pubescent +, glabrous +  and not glaucous +
concave +
adnate +, free +  and distinct +
disarticulating +  and solid +
decumbent to erect +  and prostrate +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
compound +, branched +  and simple +
axillary +  and subterminal +
nonmembranous +
sessile +  and petiolate +
deciduous +
glabrous +, usually scabrous +  and ciliate +
undulate +
swollen +
partly +  and foliaceous +
reddish-brown +
deciduous +  and persistent +
cylindric +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
coriaceous +  and membranous +
anatropous +, , +  and orthotropous +
accrescent +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
pubescent;glabrous +
0.5 cm5 mm <br />0.005 m <br /> (12 cm120 mm <br />0.12 m <br />) +
nonaccrescent +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
fleshy +, indurate +  and membranous +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
(2-)3(-4)-carpellate +
in P. A. Rydberg, Fl. Rocky Mts., +
slender;stout +
not scapose +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
connate +  and distinct +
spreading;erect +
Aconogonon phytolaccifolium +
Aconogonon +
species +
ovate +  and obovate +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
11 +, 10 +  and 8 +