292 PROCEEDINGS OF THE AMERICAN ACADEMY 



prorsus sessHia, irstivatione imbricata. Stamina 15, margini disci 

 cum petalis inserta (ante petala geraina, ante sepala solifaria) : fila- 

 menta simplicia filitbrmia. Carpella 2, libera et discreta, in fundo 

 calycis arete sessilia : ovaria ovata, intus complanata, processibus seti- 

 formibus brevibus undique instructa, stylo crasso terminata: stigma 



subcapitatum. Ovula 4, pendula, oblonga. FoUiculi ? — Ar- 



bu.scula insignis ; foliis oppositis lanceolatis petiolatis neriiformibus 

 subintegerrimis ; stipulis nullis; gemmis annotinis perulatis ; floribus in 

 cyma terminali corymbiformi amplissima numerosissimis ; petalis albis. 



Lyonothamnus floribundus. — Island of Santa Catalina, Cali- 

 fornia, on a higb and exposed rocky ridge of the northwest part of the 

 island: a single group found, of arborescent shrubs, 12 to 14 feet in 

 height, collected by William S. Lyon, July, 1884. 



This striking shrub is one of the fruits of Mr. Lyon's exploration of 

 Santa Catalina Island, the first thorough one which has yet been made. 

 As a well-earned acknowledgment of the discoverei-'s enterprise in 

 botanical exploration, I propose that the genus shall bear liis name. 

 Preoccupation stands in the way of the usual form ; but the name 

 chosen, which denotes that this is Mr. Lyon's shrub, will not be 

 thought amiss. To the characters above given it mny be well to add, 

 that the young foliage, branches of the cyme, and the calyxes are 

 covered with a fine and soft pubescence, which is deciduous from the 

 leaves, at least from their upper face ; that the latter are 4 or 5 inches 

 long, mostly rounded at the base, which is occasionally sinuate-lobulate : 

 tliey are coriaceous, transversely many-veined in the manner of 

 Nerium, but the veins more prominent beneath. The flowers (with 

 petals only a line or two long, little exceeding the calyx-lobes), though 

 individually small, are so numerous and crowded in the very broad and 

 ample compound cymes (of sometimes a foot in diameter) that they 

 make a fine show. 



Whether this genus is Rosaceous or Saxifragaceous cannot be fairly 

 determined until the fruit is known. T am disposed to refer it to the 

 former, and to the neighborhood of Vavquelinia and Lindleya, notwith- 

 standing the opposite and exstipulate leaves. If Saxifragaceous, it may 

 be associated with Jamcsia. 



PRIXGLEOPIIYTUM, Nov. Gen. Acanthac.-Justlciearum. 



Calyx minute 2-bracteolatus, o-jiartitus. segmentis a^qualibus ob- 

 longo-linearibus riofidulis 3-nervatis. Corolla subdeclinata: tubus cum 

 fauce brevi vix ampliori cylindraceus, limbo paullo longior : limbus 



