CEREUS. 



CACTEAE. 333 



y. tenuior DC — Caule tenuiore, costis magis approxtmalis. Num hae varie- 

 tales conslantes? 



79. C. PENTALOPHUS DC. Revue p. 117. — Pfeiff. 1. o. — Erectus cinereo-viridis 

 obtusus: costis 5 verticalib. oblusis; fasciculis approximalis; areola juniore velu- 

 tina; aculeis 5-7 setaceis divergentib., junioribus albido-flavidis, adultis griseis. 



a. simplex [C. propinquus DC). — Caule simplici; sinubus lalis obtusis; coslis 



parum prominulis; aculeis albidis: areolis subnudis. 

 p. subarliculalus (C. leptacanthus DC). Caule ramosissimo subarticulato ; costis 



irregularib. subrepandis v. tuberosis; sinubus angusliorib.; aculeis juniorib. 



flavescenlibus; areolis albo-lanatis. — In Mexico. 



80. C TUBEROSUS Pfeiff. 1. c. 102. — Erectus viridis 8-angularis : sinubus acutis 

 undulalis; costis obtusis luberosis; areolis subremolis in tuberculis positis, albo- 

 lanuginosis; aculeis 9-10 gracilib. patcntissimis subaequalib., nascentib. rubellis, 

 dein albidis, apice fuscis, centrali nullo. — In Mexico. 



§. 4. Opuntiacei. Pfeiff. l. c. p. 102. 

 (Cerei serpenlini glohosi S. Dyck, Hort. Dyck. p. 338.) 

 Caule articulato diffuso, articulis subglobosis vel ovatis, tuberculato-areolalis, 

 opuntiaeformibus, sed foliis omnino carentibus. 



81. C MONILIFORMIS DC Revue p. 60. — Prodr. IIL p. 470. - Pfeiff. 1. c. 102. f 

 — Articulato-procumbens: articulis diffusis globosis; areolis approximalis; acu- 

 leis elongatis subulatis aculissimis solitariis, vel 3-5 divergentibus. — Cactus 

 moniliformis Linn. — Lam. Dict. I. p. 541. — Melocaclus ex pluribus globulis 

 Opuntiae modo nascentibus, spinosissimus Plum. Catal. p. 19. — Plum. ed. Burm. 

 p. 191. t. 198. — In insula St. Dominici. 



82. C OVATUS Pfeiff. 1. c. — Articulatus: articulis crassis ovatis glaucis glabris, 

 subtuberosis; areolis in tuberum suramitate remotis tomentosis; aculeis bifor- 

 mibus, 8-10 brevib. selaceis rufis, vix c tomento prominentib., et 2-6 inaequalib. 

 validis divergenlib. rectis serratulis nigricanlib. v. cinereis. — Opuntia ovata H. 

 Angl. — Opuntia Gilliesii Catal. Cact. Berol. 1833. — Crescit ad 3Iendozam. 



83. C. ARTICULATUS OttoetDietr. Allgem. Gartenztng. 1833. 116. — Pfeiff. I. c.103.— 

 Articulis oblongo - globosis glaucescentib. subtnberculalo — areolatis; areolis in 

 series subverlicales dispositis inermibus, tomcnto albo brevissimo setisque brun— 

 neis vix longioribus instructis. — Opunlia articulata Otto's Gartenzeitng. 1833. 

 No. 46. — Op. polymorpha H. Angl. — Articuli l'/s-2 poll. longi, 1-2 diam. — 

 Crescit ad Mendozam. 



84. C SYRINGACANTHUS Pfeiff. 1. c. 103. — Suberectus articulatus: trunco glo- 

 boso; articulis e vertice trunci crassis subglobosis viridib. tuberculosis; areolis 

 magnis, fasciculo setarum brunnearum et aculeis 1-2 latis flexibilib. arundinaceis 

 fuscis instructis. — Opuntia platyacantha H. Angl. — Ad Mendozam crescit. 



85. G? SERPENS DC Prodr. III. p. 470. — Pfeiff. I. c. 103.— Repens ramosus sub- 

 angulalus: articulis sexangulaiib. apice aculeatis. — Cact. serpens H. B. et Klli. 

 Nov. gen. Am. VI. p. 68. — Crescit in Quito. 



86. C? NANUS DC Prodr. III. p. 470. — Pfeiff. 1. c. 104. — Repens articulalus: ar- 

 ticulis terelibus subcompressis areolatis aculeatis parum ramosis. — Cact. nanus 

 H. B. et Kth. 1. c. 68. — Crescil in Quito. 



§. 5. Protracti. Caule suberecto, cereastriformi , sed fulcro indigente, 

 subarticulafo ; articulis elongatis, non radicantibus. 



* Multangulares. 



87. C SERPENTINUS Lagasca, Anal. cienc. nat. 1801. p. 261. — Link et Otto, Icon. 

 t. 42. — DC Revue p. 51. t. 12. — Pfeiff. I. c. 104. f — Hook. Bot. Mag. t. 3566! — 

 Suberecliis, flexuoso-subscandens, tandem ramosus, 11 -angularis, viridis: sinu- 

 bus mox evanescentibus: costis compressis obtusis fere rectis; areolis subconfertis 

 minutis albo-tomentosis; aculeis rectis gracillimis, rigidiusculis, exleriorib. 9-12, 

 centrali 1, nascentib. roseis, tandem albis, nonnullis fuscis. — Cescit in Mexico. 



