314 PROCEEDINGS OF THE AMERICAN ACADEMY 



The Indian H. Rheedii (Bedyotis Rheedii, "Wight & Ai'n.) should 

 probably be referred to Eiihoustonia, notwithstanding the reduction of 

 the ovules and seeds to a single pair. These closely resemble those of 

 the typical H. ccerulea. But Hedyotis Wightiana, Wall., associated 

 with the former by Wight and Arnott, is truly a Hedyotis ; the hard 

 nucumentaceous fruit (in good Hookerian specipiens) not being loculi- 

 cidal at the summit, but splitting readily through the narrow partition 

 into two closed, or at length ventrally dehiscent cocci, and the seeds 

 are not meniscoidal, but flat-lenticular, as in genuine Hedyotis. 



Although I have not seen the seeds, I have little hesitation in pro- 

 posing to constitute a peculiar subgenus, Macrohoiistonia, for two shrub- 

 by, large-flowered, Mexican species which Kunth referred to Bouvardia. 

 This affinity in the case of one of them, H. trijlora, has been noticed 

 by Bentham ; for his Anotis longi flora, PI. Hartw. no. 206, is apparent- 

 ly Bouvardia triflora, H. B. K., the figure of which De Candolle has 

 omitted to quote. The other, H longiflora, is ^ginetia longiflora, Cav., 

 Bouvardia longiflora, H. B. K. Coulter's specimens (no. 215, from 

 Real del Monte) want the fruit. But the seeds, as figured and de- 

 scribed by Cavanilles, appear to resemble those of H. rubra, but with 

 the thin margin more decidedly winged. Whether or not these plants 



■t- -t- Semina depresso-acetabuliformia, Isevia, intra caveam hilo lincari elevato 

 notata, ore ovali : csii. pr£ecedentium. 

 H. PATENS, Ell. Hedyotis cterulea /3. minor et H. minima, Torr. ^ Gray, Ft. 2, 

 p. 38, pro parte. 



* * CorolliE tubus lobos calycis amplos hand superans : pedunculi prcecociores 

 elongati, fructiferi patentes : semina fere H, cxeru'ece sed majora. 

 H. MINIMA, Beck. Hedyotis minima, Torr. ^ Gray, 1. c. pro parte, excl. char. 

 Planta vernalis ; caulibus demum ramosis 3 - 4-pollicaribus patentissimis ; foliis 

 scabris, imis ovatis vel spathulatis, superioribus oblongis sublinearibusve ; corollae 

 lobis tubo aequilongis. Calycis lobi scsquilineales. 



2. Capsula apice tantum libera : semina fere sect. 3 : corolla parva : pedunculi fruc- 



tiferi laterales patentissimi. 

 H. SUBVISCOSA. Oldenlandia subviscosa, C. Wright, in Gray, PL Wright. 2. p. 

 68, adn. Texas, Wright, Berlandier, coll. no. 991, 2421. 



3. Capsula; matures | - 1 superae, e pedunculis brevissimis latcralibus recurvis pen- 



dul£e : semina leevissima, patenti-crateriformia, lateribus tenuibus quasi alatls, 

 intus hilo lineari elevato notata. 

 H. HUMiFUSA. Hedyotis (Houstonia) humifusa. Gray, PL Lindl. 2. p. 216, & 

 PL Wright. 1. p. 82. — Corolla brcviuscula. 

 H. RUBRA, Cav. Corollte tubo elongato-filiformia. 



