86 LEAFLETS. 



which though distinct they are equal); (6) receptacle mostly 

 enlarged under the fruit as in Thelypadium,\ivd,{a. neither Eu- 

 clisia nor Streptanthus; (7) pods in certain species narrow and 

 torulose as in Thelypodium, and with small but plump seeds 

 wingless and even marginless. 



Plbiocakdia, then, has a calyx peculiarly its own, a corolla 

 nearest that of Euclisia, though in several species with petals 

 showing a well developed limb, thus inclining to Streptanthus, 

 stamens half way between those of the two genera, and often 

 with the pods and seeds of 2'helypodtum, though nearer in floral 

 character making any approach to the type of that genus. 



In arranging the sequence of species my custom is to place those 

 first which seem to me to have the clearest claim to represent a 

 genus ; and therefore these stand as its type. 



P. TORTUOSA. S. tortuosus, KcU. Greene, Fl. Fr. 258. 



P. FOLiosA. S. foliosus, Greene, Pitt. iii. 226. 



P. oebioulata. 5. orbiculatus, Greene, Fl. Fr. 258. 



P. sUFFKUTESCEiirs. 5. suffrutescens, Greene, Erythea, i. 147. 



Doubtless flowering at first as a biennial, after that enduring 

 for several years and becoming suffrutescent. 



Those next following are, I think, all mere annuals, most of 

 them in at least one particular as well fitted as the preceding 

 group to stand as typical of a genus. I even apprehend their 

 being placed, by and by, in the rank of a separate genus on 

 account of their having the pods and seeds of Thelypodium. 



P. Bkeweei. S. Breweri, Gray, Greene, Fl. Fr. 259. 



P. HESPBKiDis. S. hesperidis, Jeps. Erythea, i. 14. 



P. GEACiLis. S. gracilis, Eastw. Proc. Cal. Acad. 2Ser. ii. 285. 

 I have not seen this plant, but Miss Eastwood's diagnosis 

 leaves no room for doubt as to its being a genuine Pleiocardia. 



P. FENESTRATA. Low slcuder glabrous glaucous annual, 

 branched from the base, 6 inches high ; proper foliage wanting 

 in the very mature specimens, a few small ovate cordate-clasp- 

 ing entire bracts on the branches : calyx very small, deep-pur- 

 ple : corolla large for the plant, the petals with well developed 

 broadly obovate limb and slender claw, the whole of a faint 

 rose-color beautifully fenestrate with delicate dark-red veins : 



