56 RUBIACEZ. 
6. Diodia sarmentosa, Sw. Fl. Ind. Occ. i. p. 231; DC. Prodr. iv. p. 563. 
South Mexico, Guatulco (Léebmann, 174, 175), valley of Cordova (Bourgeaw) ; 
GuateMaLa (Friedrichsthal) ; Nicaracua (Tate, 354).—Gu14na and West INDIES. Hb. 
Kew. | 
7. Diodia setigera, DC. Prodr. iv. p. 563. 
SoutH Mexico, Vera Cruz (Gouin); GuaTEMALA, between Intraba and Santa Cata- 
rina (Bernoulli, 714); Nicaragua, Segovia (Ersted).—Brazit. Hb. Kew. 
8. Diodia teres, Walt. Fl. Carol. p. 87; DC. Prodr. iv. p. 562. 
Spermacoce diodina, Michx. Fl. Bor.-Amer. i. p. 82. 
Missouri and Carolina to Frormpa and—Nortu Mexico, Sonora (Wright, 1122). 
Hb. Kew. 
9. Diodia tetracocca, Hemsley, Diag. Pl. Nov. pars altera, p. 82. (Tab. XL. 
fig. 10-15.) 
Perennis, nana, ramosa, ramis graciliusculis puberulis, foliis coriaceis lineari-lanceolatis apice sparse 
ciliatis, floribus solitariis vel geminis, lobis calycinis seepissime 4 ciliatis corollam zequantibus, 
stylo quadrifido breviter exserto, fructu tetracocco. 
Herba perennis, 2-3-pollicaris, ramosa, ramis graciliusculis, puberulis. Folia opposita, sessilia, 
coriacea, lineari-lanceolata, 38-5 lineas longa, acutiuscula, margine revoluta, apicem versus 
sparse ciliata ; stipule connate, breviter setose. Flores sessiles, sepissime tetrameri, solitarii 
vel geminati; calycis limbus sepe 4-lobus ; lobi subineequales, unus vel duo eorum interdum 
desunt, coriacei, lineares, grosse albo-ciliati, 1-14 lin. longi, persistentes ; corolle tubus gracilis, 
sursum dilatatus, 1-1} lin. longus, lobi ovati, obtusi, semilin. longi, apice leviter barbati ; 
stamina ori corolle inserta, filamentis brevibus ; stylus filiformis, quadrifidus, breviter exsertus. 
Fructus tetracoccus, sulcatus, subglobosus, glaber, lobis calycinis coronatus, 4-spermus.— 
Spermacoce ? tetracocca, Mart. et Gal. in Bull. Acad. Brux. xi. 1, p. 182. 
Sourn Mexico, near Cuernavaca (Schaffner, 32), Real del Monte (Coulter, 197), 
Morelia, 7000 feet (Galeotti, 2587): Hb. Kew. 
This plant has been referred to various genera in herbaria; but it certainly is closely 
allied to Diodia tricocca, Torr. & Gray, a Texan species. 
EXPLANATION OF TAB. XL. Fiee. 10-15. 
‘Fig. 10, a plant, natural size; 11, portion of branch, showing leaf and stipule; 12, a flower; © 
13, one lobe of corolla and a stamen; 14, vertical section of pistil ; 15, horizontal section of 
pistil: all enlarged. 
10. Diodia villosa, DC. Prodr. iv. p. 562; Calques des Dess. Fl. Mex. 494. 
Soutu Mexico, near Tantoyuca (Ervendberg, ex A. Gray); New Spain (ex DeCandolle). 
66. DASYCEPHALA. 
Dasycephala, DC. Prodr. iv. p. 565 (Diodie sect. 2) ; Benth. et Hook. Gen. Plant. i. p. 148. 
A Tropical-American genus of three or four herbaceous species. 
