54 PROCEEDINGS OP THE AMERICAN ACADEMY 



of the Prodroinus, I am compelled to add two others. The known 

 species may be discriminated as follows :* — 



Antiphytuji DC. I do not know the Brazilian species, but 

 the srenus orisfinates with A. Mexicanum DC, founded on one of 

 Mo^ino and Sesse's drawings, probably a congener of A. heUotro- 

 pioides A. DC. A. limfolium and A. Walpersii are Eritrichia. A 

 character of A. heliotropioides, and of another species which I venture 

 to associate with it, is probably alluded to in De Candolle's generic 

 character, i.e. a small perforation in the large scar of the nutlets ; and 



* AMSINCKIA, Lehm., Fisch. & Meyer. 



§ 1. Nuculas (Eritricliium § Plagiohothrys referentes) opacEe, asperataa vel rugosae, 



ovato-trigonse, subincurvae, intus ab apicem usque ad cicatricem sat latam 



carijiatse, 



* Dorso convexo carinatae. 



— Corolla tubo calyce 2-3-plo longiore : plantae sjepius strictas, angustifoliae. 



1. A. 8PECTABILIS Flsch. & Meyer. Corolla aurantiaca, saepius semipollicaris, 

 fauce ampliata: antherae lineari-oblongse, aut fauciales exsertae aut infra medium 

 tubi: calyx rufo-hirsutus : nuculje granulato-rugulosae vel submuricatje. 



2. A. ECUiNATA. Corolla ut videtur flava, tenuis, lin. 3-4 loiiga, fauce vix 

 ampliata: antherEe brevi-oblongae fauce inclusa: calyx fulvo-hispidus : nueulae 

 dorso magis convexae undique molliter echinatas. — Sandy plains in the Mohave 

 district, south-eastern part of California, Dr. J. G Cooper, Feb. 1861. Nutlets 

 only a line long, beset with slender and narrow but rather soft prickly processes, 

 and between them sharp granulate points. 



-»-+- Corolla tubo calycem flavido-hispidum rix superante. 



8. A. LTCOPSOiDES Lehm. Ramosa : antherae aut sub fauce aut supra me- 

 dium tubi insertfe, oblongae : nuculaj dorso valde convexae, muriculato-rugosae. — 

 A li/copsoides (Lehm.) & A. intermedia Fisch. & Meyer. A. Domjlasiana A. DC. 



* * Nueulae dorso lato planiusculo minime carinato. 



4. A. TESSELLATA. Validior, setoso-hispida : folia lineari-lanceolata vel ob- 

 longa : corolla aurantiaca, hypocraterimorpha, tubo (lin. 3 longo) calyce rutidulo- 

 liispido paullo longiore: nueulae lato-ovatas, verrucis truncatis crebris (aut inor- 

 dinatis aut in lineas transversas coordinatis) instruetas demum quasi tesselatse. — 

 California and Nevada. Contra-Costa Mountains near Monte Diablo, Brewer. 

 Fort Tejon, Xantus. Near Carson City, Anderson. Sierra County, Lemmon. 

 Humboldt Mountains, &c., Watson (.4. h/copsoides, pro parte, Bot. King), and 

 Pahranagat Mountains, Miss Searls. Nutlets pretty large. 



§ 2. Nuculaj triquetrae, rectae, laevissimae, saepius eburneae, dorso fere piano, 

 angulo ventrali acuto infra medium cicatrice angusta. 



5. A. vERNicosA Hook. & Arn. — Little known; thus far collected only by 

 Douglas and by Coulter. 



