ROBINSON. JAEGERIA AND RUSSELIA. 319 



* * * Heads small, discoid : branched pubescent annual : Galapagos Islands. 



9. J. gracilis, Hook. f. I.e. 213. — Charles Island, Darwin. 



Doubtful species. 



J. beleidioides, Spreng. Syst. iii. 591, of Uruguay, is unrecognized 

 and probably, like nearly all of the other species referred by Sprengel 

 to Jaeyeria, belongs to some other genus. 



Tiie Genus Russelia. 



Considerable recently acquired material of Russelia seems to show 

 Bentham's extreme reduction of the species ill-advised. At least a 

 dozen may be recognized with advantage. The following provisional 

 key may prove of assistance iu identifying the members of this confused 

 genus. 



* Stems and branches sharply 4-angled, the angles bearing ciliated wings : pe- 



duncles opposite, axillary, solitary. S. America. 



1. R. alata, Cham. & Schlecht. Linnaea, iii. 3 (1828) ; Schmidt in 

 Mart. Fl. Bras. viii. pt. 1, 2G9, t. 44, f. II. — Tropical Brazil, Sellow 

 & Riedel. 



* * Stems and branches sharply angled not winged; the angles prominent, often 



thickened; the intervening areas flat or concave. 



4- Juncoid, excessively branched : peduncles filiform, 1-2 (-S)-flowered, much ex- 

 ceeding the subtending bracts. % 



2. R. equisetifokmis, Schlecht. & Cham. Linnaea, vi. 377 (1831). 

 R. juncea, Zucc. Flora, 1832, II. Beibl. 99 (1832), is only a large 

 flowered form of this species. The type of R. equisetiformis has been 

 examined by Mr. J. M. Greenman in Berlin and proves to have corollas 

 which vary from 1 to 2 cm. in length, thus invalidating the chief dis- 

 tinction between the species, a fact also noted by Dr. Loesener, Bull. 

 Boiss. ii. 562. 



•<- i- 1'eduncles short, the primary ones never equalling the subtending leaf-like 

 bracts, usually several-many-flowered. 



++ Leaves entire, subcoriaceous, lucid. 



3. R. subcoriacea, Robinson & Seaton, Proc. Am. Acad, xxviii. 

 113. — Tamasopo Canon, San Luis Potosi, Mexico, Privgle, no. 5086. 



i-f ++ Leaves serrate : calyx-lobes oblong-lanceolate, gradually attenuate, not at 

 all subulate at the tip : flowers 2 to 2.4 cm. in length. 



4. R. jaiiscensis. Copiously branched : stems and branches sharply 



