OF AKTS AND SCIENCES. 317 



tip Cosmanthus and Microgenetes as genera. That the internal j^hcfe 

 or ajipendages of the corolla are not available for generic distinctions 

 Was early seen bj Bentham. If absent in the Chilian Microgenetes, 

 they are conspicuous in nearly related North American species, the 

 group being well marked by the transversely corrugated seeds. I have 

 arranged the about fifty species known to me under seven subgenera, 

 characterized by the ovules, seeds, and in part by the presence or 

 absence of the corolline plicae. 



§ 1. EUPIIACELIA. Placentce 2-ovulatfe: semina verticalia, testa 

 areolata vel alveolata : corollas lobi baud fimbriati, tubo plicis lamelli- 

 formibus per paria juxta basim staminum. 



* Folia inferiora ramique opposita : spicae laxse, parum secundoe vel 

 circinataj : pubes nunquam hispida. 



1. P. NA3IAT0TDES. Annua, subspithamaja, tenuis, inferne glaberrima, 

 superne glanduloso-pubescens ; ramis brachiatis; foliis lineari-lanceolatis 

 iutegerrimis subpetiolatis spicas cymasve primum superantibus ; sepalis 

 spathulato-linearibus corolla anguste campanulata brevioribus capsulam 

 globosam minime hirsutam sui^erantibus ; staminibus styloque demum 

 bipartito inclusis ; plicis basi staminum subadnatis brevibus ; semini- 

 bus alveolato-reticulatis. — Nama racemosa Kellogg in Proc. Acad. 

 Calif. 5, p. 51. — In the higher Sierra Nevada, California, Bolander, 

 Kellogg. It is not surprising that this anomalous little plant was 

 described as a Nama. Its aspect is very unlike any other Enphacella^ 

 but is somewhat like Emmenanthe glaberrima. The geminate ovules 

 and seeds are those of Euphacelia. 



* * Folia (generis) alterna: flores scorjiioideo-spicati : jiuljes pi. ra. 

 hispida vel hirsuta : plicae corollas latfe, Sfejiissime basi staminum 

 utrinque adnatas. 



+" Folia aut integerriraa aut piunati-S-o-jDartita segmentis integer- 

 rimis : capsula ovata, acuta. 



++ Perennes vel biennes : genitalia longe exserta. 



2. P. CIRCIXATA Jacq. f. ; A. DC, cum syn. P. leucophylla Torr. in 

 Frem. Rep. 1, p. 93. P. canescens Nutt. PI. Gamb. — Var. calycosa: 

 forma calycis lobis demum ampliatis oblongis vel obovato-spathulatis. 



++ ++ AnnuEe, minores. 



3. P. Breweri. Formte depauperatas prjecedentis similis, gra- 

 cilior; radice exili ; corolla violacea lato-campanulata calycis lobis line- 

 aribus duplo longiore filamenta glabra parum superante. — On Monte 



