30 PROCEEDINGS OF THE AMERICAN ACADEMY, 
is irregular, a trait which, if it really were true, would place the genus 
in the Mutisieae. Finally Addisonia is described and figured as having 
corollas with campanulate throats. Under these circumstances, it is 
by no means remarkable that the real affinity of these plants has 
not been noticed until authentic specimens of each of them could be 
studied in relation.to the others. The combined genus may be treated 
as follows : 
HELOGYNE Nutt. (Nomen ab jos, clavis, et yey, mulier, ob forma 
styli ramorum incrassatorum.)— Capitula parvula homogama 6-12- — 
flora terminalia vel subcorymbosa vel spicato-racemosa ; involucro 
subcylindrico vel anguste campanulato, squamis 2—4-seriatis imbrica- 
tis, receptaculo parvo nudo planiusculo. Corollae anguste tubulosae 
vel etiam angustissime fusiformes nullo modo in fauces ullos distine- 
tos ampliatae externe glanduloso-puberulis vel pulverulis, limbi brevis- 
sime 5-dentati dentibus suberectis vel leviter patentibus. Antherae 
lineares inclusae apice obtuse appendiculatae basi integrae. Styliraml 
valde exserti plus minusve patentes valde sed gradatim incrassati flav 
vel saepius nigrescentes. Achaenia 5-costata prismatica deorsum levi- — 
ter angustata. Pappi setae subaequales tenues achaeniis subaequilon- 
gae vel superantes barbellatae vel subplumosae. — Trans. Am. Phil == 
Soe. n. s. vii. 449 (1841); Walp. Rep. vi. 107 (1846); Benth. et Hook — 
f. Gen. ii. 239 (1873) ; Hoffm. in Engl. et Prantl. Nat. Pflanzenf iv. 
Ab. 5, 133 (1890). Brachyandra Phil. Fl. Atac. 34, t. 4, f. D (1860); 
Benth. et Hook. f, l.¢. 244 (1873); Hoffm. 1 c. 138 (1890); Reiche, 
Fl. de Chil. iti. 263 (1902). Leto Phil. Ann. Mus. Nae. Chil. see. a 
(botanica), 33, t. 1, £ 3 (1891); Hoffm. 1. ¢. 334 (1893). Addisoma” 
Rusby, Bull. Torr. Bot. Club, xx. 432, t. 169 (1893). — Frutices ramo- 
sissimi foliosi glanduloso-puberuli. Folia alterna parva integra 
dentata vel lobato-subpinnatifida sessilia. ae 
Species 4 regionis desiccatae Peruviae et Boliviae australis et 7 
publicae Chilensis borealis incolae. | 
Sect. I. Evuetoeyneg, sect. nov., involucri squamis subaequalibus ¢ 
2-seriatim imbricatis. — Helogyne Nutt. 1.¢. Leto Phil. 1. c. — Spee 
unica. 
1. H. apatorea Nutt., ramis arcuato-ascendentibus foliosis, 
nodiis brevibus ; foliis parvis 8-15 mm. longis cuneato-ob a 
integerrimis vel saepius irregulariter pinnatim 2-3-lobatis vel 84 ae 
solum apice 2-3-dentatis glanduloso-puberulis amaris ; capitulis | 
floris paucis erectis corymbosis, pedicellis gracilibus erectis vel arena” 
ascendentibus ; involucri squamis subaequalibus anguste e4 
