RUBIACEE. 29 
22. OLDENLANDIA. 
Oldenlandia, Linn. Gen. Plant. n. 154; Benth. et Hook. Gen. Plant. ii. p.58. (Gerontogea, Ch. et 
Schl. in Linnea, v. p. 169.) 
About seventy species of slender herbs, generally dispersed in tropical and subtropical 
regions, but most numerous in Asia. 
1. Oldenlandia deppeana, DC. Prodr. iv. p. 428. 
Gerontogea deppeana, Ch. et Schl. in Linnea, v. p. 169; Neue Abbild. t. 36. 
Sour Mexico, San Andres (Schiede & Deppe). 
2. Oldenlandia halei, Chapm. F1. S. States, p. 181. 
Hedyotis halei, Torr. & Gray, Fl. N. Amer. ii. p. 42. . 
Fioripa.—Nicaraeua (Lévy, 208)’—Cusa. Hb. Kew. 
3. Oldenlandia herbacea, DC. Prodr. iv. p. 425. 
Hedyotis herbacea, L. Fi. Zeyl. p. 65. 
Sourn Mexico, Jecaltepec (Liebmann, 145); Guatumaua (Friedrichsthal) ; Nicaracva, 
Javali (Tate, 191); Panama, Empire railway-station (8. Hayes), Chagres (Fendler).—A 
common weed in TRoPIcAL Countrizs. Hb. Kew. 
O. corymbosa, Linn., is perhaps the correct name of this species. 
4. Oldenlandia latifolia, Mart. et Gal. in Bull. Acad. Brux. xi. 1, p. 235. 
Sout Mexico, Jalapa, at 3000 feet (Galeotti, 2556). Hb. Kew. 
This appears to be the same as the next. 
5. Oldenlandia microtheca, Ch. et Schl. in Linnea, vi. p. 414. 
Gerontogea microtheca, Ch. et Schl. in Linnea, v. p. 169. 
Soutn Mexico, Papantla (Schiede), valley of Cordova (Bourgeau, 1572), region of 
Orizaba (Bourgeau, 2936 ; Botteri, 602), Yecoatla (Liebmann, 142), Mirador (Linden, 
1258). Hb. Kew. 
6. Oldenlandia umbellata, Linn. ex DC. Prodr. iv. p. 426. 
This doubtful species is recorded by DeCandolle from Mexico, Tropica AFrica, and 
ASIA. 
23. HOUSTONIA. 
Houstonia, Linn. Gen. Plant. n. 124; Benth. et Hook. Gen. Plant. ii. p. 60. 
About twenty species of dwarf herbs, restricted to North America and Mexico. 
1. Houstonia angustifolia, Michx. Fl. Bor.-Amer. i. p. 85. 
Hedyotis stenophylla, Torr. & Gray, Fl. N. Amer. ii. p. 41. 
Oldenlandia angustifolia, A. Gray, Pl. Wright. i. p. 68. 
Missourr southward to Fioripa and Trxas.—Norta Mexico, Sonora (Wright). 
Hb. Kew. 
