BOKKAGINACE;E. (BOKAGE FAMILY.) 359 



3. TOURNEFORTIA, L. 



Calyx 5-parted. Corolla salver-form or wheel-shaped, 5-lobed. Stameus 5, 

 included. IStvle short, termiual ; stigma conical. Drupe composed of two 

 2-seeded nutlets, which are either united or separable, or by abortion 1 -2- 

 seeded. Erect or twining shrubs, with entire leaves, and white or yellowish 

 flowers, in 1-sided bractless often cymose spikes. 



* Fruit orate, separable into ttco 2-seeded nutlets: corolla lobes ovate, plicate. 



1. T. gnaphalodes, H.Br. White-silky throughout ; stem thick, erect ; 

 leaves verv numerous and imbricated, linear, obtuse, fleshy, tapering to the 

 base ; peduncles axillary ; spikes 2 - 4-parted, dense, recurved ; calyx lobes 

 oblong, obtuse ; corolla fleshy ; anthers ovate ; drupe deeply excavated at the 

 base. Sea shore, South Florida. Shrub 2 -4 high. Leaves 3' long. 

 Corolla small, white. 



* * Fruit globose, more or leas lobed, composed of 1-4 nutlets, each 1 -seeded : 



corolla lobes narrow, acute. 



2. T. volubilis, L. Stem twining, and, like the lower surface of the 

 leaves and spikes, toinentose ; leaves ovate or oblong-ovate, petioled, roughish 

 above, paler beneath ; spikes lateral and terminal, very slender, cymose, short- 

 peduncled, spreading ; tube of the corolla contracted in the middle, the lobes 

 linear subulate; anthers connivent ; drupe small, 1 -3-seeded. South Florida. 

 Leaves 1'- H' long. Corolla 2" long. 



4. HELIOTROPIUM, Tourn. 



Calvx 5-parted, persistent. Corolla salver form, folded between the 5 lobes. 

 Filaments and style very short. Stigma somewhat conical. Fruit separable 

 into four 1 -seeded, or into two 2-seeded nutlets. Herbs or shrubby plants. 

 Leaves rarelv opposite. Spikes 1-sided. Flowers white or blue. 

 * Throat of the corolla ojitn. Nulli'ts 4, ench \-seedi.d. 



1. H. polypbyllum, Lehm. Rough, with short appressed white hairs ; 

 stems (1 long) spreading from a woody root, very leafy; leaves nearly 

 sessile, lanceolate; spikes leafy; nutlets 4, hairy ; corolla white, or, in var. 

 Leavenworthii, Gray, bright yellow. South Florida, the variety near Miami 

 ( Garber). 



2. H.tenellum, Torr. Annual, rough hairy ; stem erect (6'- 12' high), 

 slender, branching; leaves linear; racemes leafy or naked, remotely few- 

 flowered, calyx lobes linear, unequal ; corolla white Alabama, West Ten- 

 nessee, and westward. 



3. H. Curassavicum, L. Annual, smooth, fleshy ; stems at length 

 prostrate and diffuse ; leaves alternate or opposite, lanceolate or linear, ob- 

 tuse, narrowed at the base; spikes peduncled, simple or 2-parted, coiled in the 

 bud ; flowers small, sessile, white, bractless ; nutlets smooth. Saline marshes, 

 Florida to North Carolina. June -August. Stem 6'- 18' long. LeaA'es 

 l'-2' long. Plant dries black. 



4. H. phyllostachyum, Torr. Annual ; stem erect, branched, rough 

 with rigid white appressed hairs ; leaves oblong or lanceolate, obtuse, hispid, 



