FLORA OF THE GALAPAGOS ISLANDS. 179 



Ceeeus, Mill. 



C. GALAPAGENSis, Weber, Bull, du Mus. d'hist. nat. Paris, 1899, 

 p. 312 (1899). — Cnxni.v.s Ish.: Du Petit-Thouars. Endemic. This 

 can scarcely be regarded as a described species. 



' C. nesioticus, K. Sch. nov. sp. in litt., "humilis 30 cm. longitudinem 

 non ^ttingeus ; caiilibus caespitosis et e basi communi in omnes partes 

 more spinarum Echini radiantibus costatis ubique spinulis numerosis 

 atrocastaneis tectis ; costis humilibus 3 mm. vix superantibus alte crenatis 

 et in tubercula fere perfecte dissolutis ; areolis orbicularibus, 2.5 mm. 

 diametro lano sparse exigue tectis; spinis quam 40 pluribus inaequalibus 

 saepe (praesertim infimis) apice fractis in unam ceutralem et alias exteriores 

 non distributis, maximis 3 cm. longis omnibus quam setae equinae vix 

 rigidioribus erectis strictis divaricatis non pungentibus ; floribus 7 cm. 

 longis ; ovario subgloboso subobliquo leviter tuherculato et spinulis ad 



5 mm. longis flavo-fuscis radiantibus armato ; tubo perigonii angusto 

 item in areolis spinoso, lobis exterioribus lanceolatis 1.2 cm. longis vix 

 2 mm. latis, interioribus etiam angustioribus et ma^is linearibns verosi- 

 militer albis; staminibus prope faucera, filamentis perbrevibus non 

 1 mm. longis, antheris bis vel paulo ultra longioribus ; fructu ellipsoideo 

 in summo spinoso-areolato basi acuto 2.5 cm. longo et 1.3 cm. crasso ; 

 seminibus numerosis, 1.2 mm. longis ellipsoideis rufis leviter punctatis." — 

 Albemarle Isl. : Black Bight, Syiodgrass & Heller, no. 923 (lib. Berl, 



6 hb. Gr.) ; lava fields, Elizabeth Bay, Snodgrass & Heller, no. 939 

 (hb. Berl. & hb. Gr.); Point Christopher, Snodgrass & Heller, no. 

 932 (hb. Berl. & lib. Gr.). Narborough Isl. : eastern side, on barren 

 black lava, Snodgrass & Heller, nos. 919 (hb. Berl. & hb. Gr.), 927 

 (hb. Berl. & hb. Gr.). " Note. — This speries is a very peculiar one 

 from its long brown non-pungent spines, which clothe the stem so densely 

 that its surface is invisible. I have never before seen a species of the 

 genus with such short filaments as in this. The petals are also uncom- 

 monly narrow. Probably the flower is white. I think it can hardly be 

 compared with either of the two species of Cereus thus far known from 

 the Galai)agos Islands. From C. Thouarsii, AVeber, which is said to be 

 similar to C. midtcmgularis, it is perfectly distinguished by the mode of 

 growth and by the much smaller fruit which does not at all resemble a 

 large prune " [K. Sch. in litt.]. Endemic. 



C. sclerocarpus, K. Sch. nov. sp. in litt., " arborescens ; caule prin- 

 cipali 3-G m. alto 15-22 cm. diametro ramos paucos sibi saepius paral- 

 lelos gereute ; articulis costatis, costis iu sectione transversa triangularibus 



