8. 17. Hernandiaceae Hernandia ovigera L. A tall evergreen tree becoming butressed at the base; leaves spirally arranged and the long petiole of each joins the blade well within the leaf margin; unisexual flowers, 2 male flowers accompany each female flower; fruit a black, oily nut. 18. Hydrophyllaceae A mat forming herb with a diameter of about 8"; leaves alternate, stemless and hairy about 0.33" long; flower tubular, 5-lobed pinkish, 5 stamens. Nama sandwichensis Gray 19. Labiatae A. Creeping plant, hairy; flowers small, red to purple; leaves 0.5 to 1"....................Stachys arvensis L. AA. Plant upright at tip of stems; flowers white with purplish tint, 1" long........................Phyllostegia variabilis Bitter 20. Lauraceae Cassytha filiformis L. A parasitic vine with slender green, brown, yellow stems and branches. Leaves are few minute scales; flowers 6 parted with nine stamens; fruit fleshy, round about 0.25" in diameter. 21. Leguminosae Flowers radially symmetrical, commonly small and massed in heads or spikes; trees and shrubs..........Subfam. Mimosoideae I. Flowers bilaterally symmetrical, commonly medium to large-sized. Flowers with petals spreading, nearly equal; trees and shrubs......................................Subfam. Cassalpinioideae II. Flowers resembling the sweetpea: one large upper petal, two parallel side petals, two lower petals joined, shrubs and trees but mostly herbs..................Subfam. Papilionatae III. I. A. Leaves twice divided; pods opening by two valves when ripe, straight or curved B. Large thornless trees C. Flowers in small round heads or cylindrical spikes with short stems............................Acacia