Flora of North America species comparison

± erect;

twigs multicellular stipitate-glandular-hairy and, sometimes, conspicuously strigose (hairs elongate, stiff, long-celled, eglandular), otherwise sparsely to densely unicellular-hairy.

persistent or deciduous, alternate, sometimes pseudoverticillate [in whorls of 3];

blade ovate, elliptic, or slightly obovate, coriaceous, margins obscurely to clearly toothed or serrulate [entire], plane or revolute, surfaces multicellular, short-stalked stipitate-glandular-hairy (along with, in P. floribunda, stout, elongate hairs associated with marginal teeth, and unicellular-hairy on midvein adaxially);

venation brochidodromous to reticulodromous (veins of varied thickness and conspicuousness).

axillary or terminal panicles or racemes, 15–35-flowered, (borne the year preceding flowering).

bracteoles 2, proximal or distal.

sepals 5, slightly connate, ovate [oblong-lanceolate];

petals 5, connate for nearly their entire lengths, white, corolla urceolate to cylindric-urceolate, lobes short;

stamens 10, included;

filaments straight or geniculate, glabrous or hairy, with 2 stout, minutely papillose spurs at anther-filament junction;

anthers without awns, dehiscent by elliptic pores;

pistil 5-carpellate;

ovary 5-locular;

stigma capitate.

capsular, subglobose or globose to ovoid, (with unthickened sutures), dry.

40–100, ellipsoidal to obovoid, ± rectangular or angular-ovoid, or narrowly conic, flattened or not, (sometimes slightly winged);

testa cells elongate or isodiametric.

= 12.