Oxypolis rigidior (cowbane or common water dropwort) Apiaceae (5 5 5 2) 356 -- 5-16 lance-shpd lflts; ADT/ADE; swamps/wet woods Oxydendrum arboreum (sourwood tree) Ericaceae ((5) 5 10 1) 189

P

Pachysandra procumbens (pachysandra) Buxaceae 311 --

Pachysandra terminalis Buxaceae 311 -- narrower leaves; terminal infl

Panax quinquefolius (American ginseng) Araliaceae (5 0 5 2or3 epi) 343 -- 3 lvs from stem top; 5 lflts each w/ lower 2 very small

Panax trifolius (dwarf ginseng) Araliaceae (5 0 5 2or3 epi) 343 -- lvs trifoliate

Panicum aciculare (bristle-like panic grass) 759 -- lf blades long & slender; pine barrens

Panicum amarulum (slightly bitter panic grass) 752 --group I & II

Panicum amarum (bitter panic grass) 752

Panicum anceps (two-edged panic grass) 751 -- group I & II; moist soil; flat-stemmed; kernelly xmas tree, erect; intrrptd infl; lf hugs infl/ lvs 1/2"

wide & long

Panicum boreale (northern panic grass) 757 -- group 6; lf blades long & slender; open woods, fields, shores

Panicum boscii (Bosc's panic grass) 760 -- group 6; hairy on stem and leaves; woods

Panicum capillare (witch panic grass) 753 -- group I & II; wispy infl; bottom part of infl in the fuzzy sheath; dry or moist soil

Panicum clandestinum (deer-tongue panic grass) 759 -- group 6; lvs not hairy; stems hairy; moist woods & thickets

Panicum columbianum (District of Columbia panic grass) 755 -- group IV; one stem; snow-cone infl; lanceolate lvs; moist or dry, esp. sandy soil

Panicum commonsianum (Common's panic grass) 755 -- group IV; basal lvs rosette-like; coastal plain

Panicum commutamum (changeable panic grass) 759 -- group 6; woods & thickets

Panicum depauperatum (impoverished panic grass) 754 -- group I & II; lvs surpass appressed infl; kernelly-like; dry/sandy, open woods

Panicum dichotomum (forking panic grass) 757 -- snow-cone infl; hairy at base of lf blade; woods & disturbed pls.

Panicum dichotomiflorum (fall panic grass) 753 -- group I & II; smooth flat stem; relatively wide lvs; many branches; infl green or purple; moist soil

Panicum ensifolium (sword-shaped panic grass) 758 -- like a depauperate P spretum, also not hairy, but infl higher than lvs; bogs & wet woods

Panicum flexile (wiry witch panic grass) 753 -- group I & II; puny infl; wiry; moist or dry, open woods

Panicum hemitomon (maiden cane panic grass) 751 -- group I & II; kernel-looking, thin spikes; swamps & ponds

Panicum lanuginosum (woolly panic grass) 756 -- group V; short wide rosette; small infl at end of each stem; widespread

Panicum lanuginosum v tennesseense (Tenn woolly panic grass) 756 - group V; moist soil; rnd spklts; vry hry, bldes nrly glabrous

Panicum latifolium (broad-leaved panic grass) 760 -- group 6; lf blade very fat except towards tip; not hairy; woods & thickets; woods & thickets

Panicum leucothrix (white-haired panic grass) 756 -- group IV; like a depauperante P spretum, but very hairy; infl surpasses lvs

Panicum linearifolium (linar-leaved panic grass) 754 -- group I & II; infl = to or just surpassing lvs; dry soil

Panicum longifolium (long-leaved panic grass) 752 -- group I & II; bristly sheath at node ; coastal plain

Panicum miliaceum (proso millet panic grass) 753 -- group I & II; bottom part of infl in the fuzzy sheath; roadsides & waste pls.

Panicum oligosanthes (few-flowered panic grass) 761 -- group XI; hairs at node; dense infl; dry or most, often sandy

Panicum philadelphicum (Philadelphia panic grass) 754 -- group I & II; wispy infl; naked brnchs, but 2 spklts at end of branches; lf sheath pubescent

Panicum polyanthes (many-flowered panic grass) 760 -- linear-cylindric, dense infl; not hairy; very small spikelets; dry or damp

Panicum rigidulum (rigid panic grass) 752 -- group I & II; spead-out infl; wet soil

Panicum scabriusculum (somewhat harsh panic grass) 758 -- snow-cone like infl; hairy at blade base & sheath bottom

Panicum scoparium (velvet panic grass) 759 -- lf blade at node hairy; snow cone like infl; hairy at blade base & sheath bottom; wet soil

Panicum sp. Poaceae group I & II; blades of basal & cauline lvs similar; lvs crowded toward base

No group III; group IV = pubescense of 2 different types

Group V = ligule a band of hairs

Group VI -- deer-tongue like lvs; heart-shaped at base

Group XI -- spikelets large

Panicum sphaerocarpon (spherical-fruited panic grass) 760 -- group 6;

Panicum spretum (spurned panic grass) 755 -- group V; many cauline & basal, thin lance lvs; infl = lf height; multi-stems; not hairy; pine barrens

Panicum verrucosum (warty panic grass) 752 -- group I & II; infl puny, wiry, open, flexible; wet woods & shores

Panicum villosissimum (villouspanic grass) 757 -- group V; open woods

Panicum virgatum (switch panic grass) 753 --

Panicum wrightianum (Wright's panic grass) 756 -- group V; coastal plain

Panicum xanthophysum (yellow-bladdered panic grass) 761 -- Group XI; small appressed infl; hairy at node & on lf sheath; deer tongue lf; dry, sandy

Panicum yadkinense (Yadkin panic grass) 758 -- cone-shaped infl; lvs not hairy, lanceolate; moist or wet woods

Papaveraceae (poppy) -- Argemone (prickly poppy); Chelidonium (celandine); Glaucium (horned poppy); Papaver (poppy); Sanguinaria

Parapholis incurva Poacee 706 --

Parnassia glauca (grass-of-parnassus) Saxifragaceae (5 5 5 0 peri) 216 -- fls white, veined w green; lvs AE; calcareous bogs, shores, wet meadows

Parnassia grandifolia (big-leaved grass-of-parnassus) Saxifragaceae (5 5 5 0 peri) 217 --

Paronychia canadensis (forked chickweed) Caryophyllaceae (0 5 us.5 1) 106 -- tiny green fls; OE ellip;widely branched

Paronychia fastigiata (forked chickweed) Caryophyllaceae (0 5 us.5 1) 106 --

Parthenium hysterophorus (Santa Maria parthenium) Asteraceae/Heliantheae 514 --

Parthenium integrifolium (eastern parthenium) Asteraceae/Heliantheae 514 -- 5 palmate lflts Parthenocissus quinquefolia (Virginia creeper) 323

Parthenocissus sp. (ivy) Vitaceae (5 5 5 1 perf or unisex; hypo) --

Parthenocissus tricuspidata (Boston ivy) 323 -- China/Japan escape

Parthenocissus vitacea (grape woodbine) 323 -- no adhesive disks; moist soil Paspalum dilatatum (dallis grass) Poaceae 764 -- 8-15dm; spikelets ovate & pubescent

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