Seymeria - Yaupon Black Senna
Seymeria cassioides (J.F. Gmelin) S.F. Blake
Orobanchaceae (Broomrape) Family

    
Seymeria cassioides                                 Seymeria macrophylla

Black Senna is an upright, branched annual that often has a bushy appearance. Its preferred habitat is sandy pine woods, edge of thin woods, rocky slopes and roadsides. Distribution is throughout the Escambia region.

The leaves are alternate on the stem; stalked and divided into long thread-like leaflets.

The flower is pale yellow; divided into five almost equal lobes; bisexual in nature and symmetrical in form; numerous stamens. The flower arises on a short stalk from the leaf axil, occurring in late summer.

S. macrophylla is an upright, branched annual with opposite leavesm large, pinnatifid, pubescent, and measures to 3 mm long. The petioles are short. Lobes are twice divided. The ultimate division is coarse serrate. The upper leaves are lance-like, lobed to crenate or entire.

The flowers are terminal spike racemes on the main stems and branches. Each flower is subtended by bracts. The flower stalks are short. The flowers appear as paired in the leaf axil. The corolla is yellow, 5-lobed and the tube is about 8 mm long, white at the base, yellow above, bearded. Flowers occur in the summer.

axillary flowers because of the foliaceous bracts. The corolla is zygomorphic, yelliow, 5-lobed The c orolla tube is about 8 mm klong, white at the base, yellow above, bearded internally Flowering occurs from June to September.

In both plants the fruit is a capsule.

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