Flora of North America species comparison

cespitose.

stipules persistent, filiform to subulate;

petiole subequal to or somewhat shorter than blade;

blade ovate to oblong-lanceolate, unlobed, base subcordate to obtuse, margins toothed, apex acute or obtuse, without foliar nectaries.

blades to 4 × 2.4 cm.

axillary, solitary flowers, ± equaling leaves;

apex;

filaments terminal and subterminal;

ovary 12-carpellate;

ovules 1 in each lower carpel cell, pendulous;

styles 12-branched, (branches equal in number to carpels);

stigmas capitate.

not articulated, 10–20 mm.

calyx subrotate, to 12 mm, to 17 mm in fruit, lobes to 7 × 8 mm (9 × 10 mm in fruit), papery, folded and slightly keeled along each commissural vein;

corolla to 15 mm, exceeding calyx;

staminal column to 4 mm.

schizocarps, not inflated, discoid, moderately indurate, stellate-hairy;

mericarps 12, 1-celled, divided internally by endoglossum;

distal cell reduced, barren, smooth-walled, hairy, each valve armed with suberect dorsal spur;

proximal cell enclosing pendulous seed, reticulate-fenestrate, indehiscent, joined to columella by single median basal-dorsal vein.

1 per mericarp, puberulent about raphe.

2 mm.

9–10 mm diam., closely invested by calyx;

mericarps pale brown, to 3 × 5 mm exclusive of dorsal spurs, spurs to 2 mm.

= 8.

= 16.