330 PROCEEDINaS OF THE AMERICAN ACADEMY 



valve is detached it may be likened to a cornucopise with a very flaring 

 mouth, holding 2 seeds. 



SiLENE BoLANDERi : multicaulis, nana, tomentulosa ; caulibus 1-5- 

 floris ; foliis spathulatis acutis basi (suramis exceptis) longe attenuatis ; 

 calyce oblongo-clavato baud viscoso, dentibus ovato-oblongis acutius- 

 culis ; petalis pallide roseis calyce duplo longioribus dentibus 2 minimis 

 coronatis, ungue lato basim versus villoso-ciliato, lamina 4 - 6-partita, 

 segmentis lanceolatis seu linearibus uno alterove nunc apice bifidis ; 

 ovario brevissime stipitato. — Wooded hillsides, Long Valley, Plumas 

 Co., Bolander. Stems 3 to 5 inches high, many from a deep perpen- 

 dicular root, leafy. Leaves 1^ to 2 inches long, including the tapering 

 base or winged petiole. Peduncle of the primary flower an inch and 

 a half long. Calyx-teeth 2 or 3 lines long. " A very showy " and 

 distinct species. 



SiLENE iNCOMPTA : viscoso-pubcrula ; caulibus csespitoso-aggregatis 

 patulis (ultrapedalibus) foliosis thyrso laxifloro racemiformi vel panicu- 

 lato terminatis ; foliis oblongis seu ovali-lanceolatis acutis ; pedicellis 

 flore brevioribus ; calyce cylindraceo (fructifero ovoideo vix semi- 

 pollicari), dentibus lanceolatis tubo dimidio brevioribus ; petalis albidis 

 parvulis, lamina lineari-oblonga ungue apice utrinque unidentato vix 

 latiori bifida, lobis nunc emarginatis vel bilobis, corona e dentibus 

 subulatis. — Mount Bullion, and in the Yosemite Valley, in large tufts, 

 Bolander. — Calyx sometimes purplish towards the base. Lamina of 

 the petals only 3 lines long. 



ACHYRONYCHIA, Torr. & Gray, nov. gen. 



Calyx 5-fidus, persistens ; tubo 10-nervi coriaceo demum cyHn- 

 draceo ; lobis mox radiato-patentibus ovalibus muticis prjeter basim 

 calloso-incrassatam argenteo-scariosis enerviis. Petala nulla. Fila- 

 menta vel staminodia 15 fauci uniseriatim inserta, tenuia, subulata, 

 unicum (rarissime 2 ?) antheriferum, csetera sterilia. Anthera didyma. 

 Ovarium uniloculare, filo conductorio axili tenuissimo percursum: 

 stylus brevis, bifidus. Ovula 2, basilaria, erecta, anatropa ? funiculis 

 brevibus. Utriculus tenuis, calycis tubo indurato inclusus, pyriformis, 

 ovulo altero sterili superstite monosperraus. Semen oblongo-pyri- 

 forme, facie recta rhaphi bx-evi cum chalaza longe infra medium notata. 

 Embryo dorsalis, albuminis parci farinacei hinc applicitus, radicula 

 elongata fere recta, cotyledonibus brevibus accumbenti-incurvis. — 

 Herbula annua, depressa, Paronycln(x seu Alter nantherce sessilts facie ; 



