Diodia.'] LXX. RUBIACEiE (hiern). 231 



2. D. rubrloosa, Hiern. Glabrous, almost shrubby below, rigid. 

 Branches subterete, somewhat compressed towards the extremities, 

 reddish brown. Leaves oval, obtuse, apiculate, wedge-shaped at the 

 base, rather thick, J-l^ by^-| in., midrib and about 4 pairs of lateral 

 veins impressed on the upper surface ; stipular sheath about -^q in. 

 deep, tipped with 3 about equally long setoD. Flowers solitary, nearly 

 J in. long, sessile, axillary. Calyx ^ in. long ; limb consisting of 2 

 foliaceous elliptical lobes ^ in. long. Corolla-tube very slender, nearly 

 ^ in. long ; lobes 4, elliptical, ^ in. long. 



Upper Guinea. Sierra Leone, Hb. Afzelius ! 



3. D. arenosa?, IDC. Prodr. iv. p. 564. Glabrous, decumbent; 

 branches ascending, scarcely a foot high. Leaves sublinear, more or 

 less narrowed at both ends, sessile, scabrous above and on the margin, 

 1-2^ by ^-J in., lateral veins obsolete ; stipules truncate, sheathing, 

 short, 3-5-8etose at the apex ; setse narrowly subulate, equalling or 

 rather exceeding the sheath. Flowers several together, small. Calyx- 

 lobes 4, lanceolate-subulate, longer than the tube. — Benth. in Hook. 

 Niger Fl. p. 423. 



ITpper Guinea. Sierra Leone ?, G. Don ! 



I have not seen the type of this Brazilian species, and only follow Mr. Bentham 

 in doubtfully referring Don's plant to it. 



4. S>. maritixna, Thonn, in Schum. Beshr. Guin. PI. p. 75. A 

 creeping or decumbent herb, with long trailing glabrate quadrangular 

 or rarely subterete branches, rising about 1 foot high, leafy towards the 

 extremities. Leaves oval, subapiculate, rounded or subobtuse at the 

 subsessile base, smooth and shining above or scabrid on both sides and 

 on the margin, rigid (at least in the dry state), ranging up to 1-1^ by 

 |— I in,, lateral veins about 4-5 pairs, impressed above, making an 

 acute angle with the impressed midrib ; stipules short, broad, truncate, 

 connecting the base of the leaves or short petioles, usually 5-setose. 

 Flowers sessile or subsessile, usually solitary, tetramerous, ^ in. long. 

 Calyx green ; lobes in fruit ^-^ in. long, lanceolate- oblong, glabrous 

 or scaberulous on the margin; intermediate teeth minute, subulate. 

 Corolla white ; lobes oval or somewhat lanceolate. Stigma subcapitate. 

 Fruit glabrous, ^^— J- in. long exclusive of the calyx-limb. — Diodia 

 foliosa, Wawra et Peyritsch, Sert. Beng. p. 39. 



upper Guinea. On sandy coasts of Guinea, Thonninff, Capt. Bahington! 

 Bananas, Sierra Leone, Afzelius ! Smeathman ! Sonegambia, Perrottet and Leprieur, 

 Heudeht! Goree, Hb. Mus. Brit.; on the Nun River, Th. Vogell Mann ! Brass, Barter ! 

 Old Calabar, W. G. Milne ! 



Xiower Guinea. Banana, Congo, Monteiro ! Chr. Smith! Loango, Soyaux ! Ben- 

 guella, Wawra. 



De Candolle in Prodr. iv. p. 594 refers Spcrmacoce commutata, Schult. from Porto 

 Rico and S. serrulata, Beauv. from Warree, as varieties of this species. 

 Occurs also in Cuba, Guatemala, etc. 



5. Z>. breviseta, Benth. in Hool. Niger Fl. p. 424. A trailing or 

 scandent herb of many feet in length, with quadrangular often scabrid 

 branches. Leaves elliptical, somewhat narrowed ab^ both ends sub- 



