ROBINSON. — ALOMIA, AGERATUM, AND OXYLOBUS. 441 



Alomia was confused by Gardner with Piqueria and Gymnocoronis, 

 but may be readily distinguished by its apically appendaged anthers. 

 Orsitiia Bert., associated with his Piqueria § Eupiqueria by Gardner 

 in Hook. Lond. Jour. Bot. vi. 430 (1847), and with Alomia by Baker 

 in Mart. Fl. Bras. vi. pt. 2, 189 (1876), and even by Dalla Torre & 

 Harms, Gen. Siph. 526 (1905), is a Clibadium, as was indicated by 

 Bentham, Gen. ii. 240 (1873). 



ALOMIA HBK. (Nomen ex d pri\ativo et Xoofxa, margo, de- 

 fectionem pappi alludens.) Capitula homogama parva vel mediocra 

 saepe numerosa laxe paniculata vel in apicibus ramorum corymbulosa 

 20-70-flora; involucri campanulati vel subturbinati squamis vel 

 subaequalibus ca. 2-seriatim imbricatis lanceolato-linearibus saepis- 

 sime acutis 1-3-costatis firmiusculis vel valde inaequahbus 3-oc-seria- 

 tim imbricatis tenuioribus striatulis; receptaculo piano vel conico 

 nudo vel plus minusve paleifero, paleis saepe angustis. Corollae albae 

 vel roseae vel purpureae saepissime extus glanduhs subsessilibus 

 conspersae rarius in tubo vel limbo hirsutae vel tomentosae rarissirae 

 glabrae. iVntherae oblongae apice appendiculatae basi rotundatae 

 hand rarenter vix connatae. Styli rami filiformi-clavellati purpurei 

 vel flavi vel aurei rectiusculi vel leviter recurvantes vel per exceptionem 

 (Subg. 3) spiraliter recurvati. Achaenia prismatica 5-angularia 

 glanduloso-atomifera vel hispidula vel glabra fusca vel nigrescentia 

 basi callosa apice annulo cartilagineo vel carnoso integerrimo vel 

 angulato conspicuo ^•el tenuissimo vel omnino obsoleto coronata; 

 pappo nuUo. — Nov. Gen. et Spec. iv. 151, 312, t. 354 (1820); Cass. 

 Diet. Sci. Nat. xxvi. 227 (1823); Less. Syn. Comp. 154 (1832); DC. 

 Prod. V. 105 (1836); Endl. Gen. 366 (1838); Benth. & Hook. f. Gen. ii. 

 240 (1873); Pfeiff. Nom. i. 116 (1873); Hoffm. in Engl. & Prantl, 

 Nat. Pflanzenf. iv. Ab. 5, 135 (1890); Dalla Torre & Harms, Gen. 

 Siph. 526 (1905), excl. syn. Orsinia. Piqueria sect. Alomia (HBK.) 

 Gardn. in Hook. Lond. Jour. Bot. vi. 430 (1847), excl. spp. attenuata, 

 eupaiorioides, latifolia, subcordata; Walp. Ann. i. 393 (1848), ex parte. 

 Lycapsus Phil. Bot. Zeit. xxviii. 499, t. 8 (1870). Adenostemma sect. 

 Alomia Baill. Hist. PI. viii. 131 (1882). — Herbae annuae vel perennes 

 vel suffrutescentes rarissime frutices. Folia ovata vel rhomboidea vel 

 lanceolata vel linearia pleraque serrata vel dentata rarius integriuscula 

 rarissime profunde pinnatifida. Inflorescentia corymbosa vel pani- 

 culata. Habitus Agerati aut Trichogoniae. Species 12 quarum 3 

 mexicanae, 1 (ulterius inquirenda) insulam chilensem incolens, ceterae 

 Brasiliam centrali-meridionalem habitantes. 



