Flora of North America species comparison

decumbent to prostrate, spreading, ascending, or erect, mat-forming, glabrous or hairy.

erect to decumbent or prostrate.

blade canoe-shaped, without abaxial groove, or dorsiventrally expanded by marginal outgrowths forming abaxial groove, margins entire, thin or scarious, surfaces glabrous or glandular or hairy.

persistent, opposite;

petiole absent;

blade acicular (ericoid), abaxial groove present or not.

axillary, solitary flowers;

perulae absent; (bracteoles shorter than sepals).

erect with deflexed tip at anthesis, elongating (or not) and straight in fruit;

bracteoles absent.

sepals ± distinct, oblong-ovate;

filaments not enlarged at base;

anthers with awns;

ovary subglobose to ovoid;

style cylindric;

stigma capitate.

pendulous;

sepals (4-)5;

petals (4-)5, connate, corolla deciduous, campanulate or cylindric, lobes much shorter than tube;

intrastaminal nectary disc absent;

stamens (8-)10;

anthers dehiscent by terminal, slitlike pores;

ovary (4-)5-locular;

placentation axile;

style straight.

capsular, dehiscence loculicidal.

borne on erect pedicels, subglobose to ovoid.

1-10, distinct, ellipsoid to ovoid, not winged.

= 13.