554 PROCEEDINGS OF THE AMERICAN ACADEMY 



To the account of these new Compositce of "Western North America 

 I append the characters of a striking new genus belonging to the Sand- 

 wich Islands, recently discovered by INIr. Horace Mann. 



HESPEROMANNIA. Nov. Gen. 3fulisiacearum. 



Capitulum homogamum, raulti- et cequaliflorum, discoideum, flori- 

 bus herraaphroditis. Involucrum campanulato-turbinatum, multiseriale ; 

 squamis chartaceo-rigidis obsolete nervatis, raucTonato-acutis, interiori- 

 bus lineari-lanceolatis, exterioribus sensim brevioribus. Receptaculum 

 planum nudum. CoroUce subcoriacete, angustaj, subregularis (leviter 

 bilabiatae, §, extus intusque glabrce, tubo 5-nervi), laciniis longis lineari- 

 bus erectis. Filamenta imo tubo corolla? inserta, e fauce exserta : an- 

 therae lineares, brevissime caudatte, caudis truncatis ultra articulum 

 baud productis. Stylus liliformis, ramis brevissimis angustis acuti- 

 usculis. Achenium oblongo-lineare, angulatura, erostre, glabrum. 

 Pappus multiserialis, setis rigidulis scabris. — Arbuscula inei'mis, 

 glaber; foliis obovato-oblongis subserratis penninerviis breviter petio- 

 latis ad apices ramorum brevium confertis ; capitulis terminalibus sub- 

 umbellatis brevi-pedunculatis ea Chuquiragce insignis oemulantibus ; 

 floribus flavis. 



Hesperojiaxnia arborescens. — On the highest part of Lanai, 

 one of the Sandwich or Hawaiian Islands ; coll. Horace Mann and W. 

 T. Brigham. 



This is specially interesting as being the only known Labiatijlora 

 from any of the proper Pacific Islands. These Compositce, so char- 

 acteristic of South America, appear to be wanting even in Juan Fernan- 

 dez. As the present plant does not fall into any published genus, it would 

 appropriately bear the name of its discoverer, Mr. Horace Mann, the 

 latest and one of the most ardent explorers of the botany of the 

 Sandwich Islands, who has gleaned not a few novelties in a field 

 which has been harvested by numerous botanists, from Nelson and 

 Menzies, in the times of Cook and Vancouver, down to Remy in 1851 - 

 1853. The name of 3Tannia, however, having been already bestowed 

 upon a genus of Simarnhece, in commemoration of the arduous botani- 

 cal services of Mr. Gustavus Mann in Tropical Africa, I venture, in 

 the generic appellation here proposed in compliment to our Western 

 young botanist of the same name, to compound the word by a distin- 

 guishing prefix. 



