Here are some characteristics of Dalea pinnata :
From Wunderlin & Hansen, "Flower spike subtended by a conspicuous involucre (head resembling that of the Asteraceae); calyx segments plumose [feathery]."
From Taylor, "Bracts prominent, overlapping, broad, reddish-brown. Calyx hairy, 5-lobed, lobes feathery. Leaves alternate, odd-pinnately compound. Leaflet segments linear to filiform, gland-dotted, smooth. Dry pinelands and sand pine scrub. Stem smooth, branched, somewhat woody, leafty, to 3 ft. tall."
From Wunderlin & Hansen: The variety adenopoda is separated from the other two varieties (pinnata and trifoliata) by the leaflets: "elliptic-oblanceolata, often folded, but not involute, 1-2 mm wide." In the other two varieties, the leaflets are "filiform to linear, usually involute, 0.3-0.6 mm wide."
Below are various views of the Summer Farewells of Wickham Park.