Hedyotis. RUBIACEiE. 43 



somewhat fleshy, rather acute, narrowed into a slight petiole ; cymules 3-5- 

 flowered, scarcely pedunculate ; shorter than the turbinate capsule. 



Red River, near Alexandria, Louisiana, Dr. Hale! — Stems 8-10 inches 

 long, branched from tlie base. Leaves an inch to an inch and a half long, 

 half an inch broad, shining underneath. Stipules broad, connate with the 

 petioles, membranaceous, truncate, witli 2-4 short subulate appendages on 

 each side. Pedicels scarcely longer than the calyx. Corolla while, about 

 twice the length of the calyx-teeth. Lobes of the stigma linear-oblong, 

 hairy. Seeds minutely roughened. — This plant appears to accord with 

 Hedyotis (Oldenlandia), except in its pentanierous flowers. 



Houstonia grandiflora, pusilla, & ciliata, Baf. monogr. Houst., in ann. sd. gen. 

 1820, (his subgenus Edrissa, which coiTCsponds to Houstonia proper,) are doubt- 

 less synonyms of H. cserulea. Houstonia obtusifolia, oblongifoUa, and hetei'ophylla, 

 Ji(7f. I. c. belong doubtless to H. longifblia and H. ciliolata. 



Suborder III. LOGANIE^E. jR. Br. (Loganiaceae, Lindl., 

 Endl. in part.) 



Leaves opposite. Stipules between the petioles, sometimes nearly 

 obsolete. ^Estivation of the corolla valvate or convolute. Ovary free 

 from the persistent calyx, or nearly so. — Shrubs or herbs, natives of 

 warm or tropical regions. 



In thus appending Logania and its nearest allies to Rubiaceas (which seems in- 

 evitable when we compare Ophiorhiza with Mitreola, a portion of Hedyotis with 

 CoelostyUs, &c.), we tiiist we are following the indications thrown out by the most 

 profound botanist who proposed the order or tribe {Appx. to Flinders, 2. p. 564, and 

 Tackeifs Congo, p. 418) ; although it is still no less true than when Mr. Brown 

 first made the remark, that there are no satisfactory chai-acters known to distinguish 

 RubiaccK from Apocynacese. 



17. CCELOSTYLIS. Torr. <^- Gr., in Endl. decad., Sficonogr. t. 101. 



Calyx deeply 5-parted. Corolla infundibuliform ; the limb 5-cleft, val- 

 vate in EEStivation, the margins slightly reduplicate. Stamens 5, inserted 

 near the middle of the tube, included : anthers oblong-linear. Ovary 2- 

 celled, free from the calyx, seated on a small 2-lobed disk: ovules 10 or 

 more in each cell, peltate, covering the somewhat projecting placentas, which 

 arise from near the base of each cell: style included : the lowerportion solid, 

 persistent; the upper half membranous, tubular, deciduous by an articula- 

 tion ; the summit cylindrical-subclavate, villous with rigid collecting hairs : 

 stigma undivided. Capsule didymous, composed of two subglobose rather 

 coriaceous carpels, which at length separate from each other and from the 

 indurated disk, opening elastically by loculicidal dehiscence. Seeds 6-8 on 

 each globose placenta, wingless, angular, scrobiculate. Embryo nearly 

 the length of the fleshy albuirien, almost straight : cotyledons oblong. — Her- 

 baceous, probably perennial plants (natives of Florida and Texas), with 

 somewhat angular stems. Leaves opposite, ovate or oblong-lanceolate, 

 somewhat veined, slightly petioled, wijh small entire stipules between the 

 petioles. Flowers small, solitary or somewliat cymulose, axillary, dichoto- 

 mal, and terminal. 



