Cacti.— Orcutt. 



young plants with 17 obtuse ribs and 

 deep inter\-als, 12-13 ribs in older plants 

 and more obtuse, areolae }^ inch apart; 

 10-12 radial spines, slender, straw-co orei, 

 centrals 4-5, the lower one the longest, 

 the upper portion of the older or florifer- 

 ■ us stems supplied with numerous ciliary 

 w'ite spines, especially abundant on the 

 side where the ficwers are pioauced: flow- 

 tr 2 inches across, a incnes long (includ- 

 ing the ovary); about 25 lonif narrow 

 scales on ovary with 6-12 fine white hairs 

 V^-1 inch long in the ax Is. ovary apple 

 green ; pstals about :0,8-;0 mm troal, 

 nearly 20 long, acute, white; sepals 

 equally numerous, brownish white; style 

 214 inches long, whitish, nearly equalling 

 ihe petals; fliaments white, anthers an 

 e'ghth :nch long and pale yellow. Flower 

 deeply embedded in a mass of persistent 

 hairs an inch long and of a snowy white 

 —tinged with yellow occasionally at the 

 tips. Fruit rearly flo'ular, 1'^ i»^ches 

 lone-, dull purrle w'th a bluish bloom; 

 remains of flower persistent; the minute 

 scales ard hairs abundant or near:y ab- 

 sent; outer skin 14 inch thick, dull purple, 

 the edible pulp t right m ganta. rather 

 insioid, sweetish, seecs 1 lack. Vieia, or 

 OH Woman cactus of the Mexicans. 

 States of PueMa and Oaxaca, Mexico 

 (Orcutt 26'9, 2679). 

 C. CO^vTMNA-TRAJANI KS. 



Erect, 15-20 feet| high, 2-3 short branch- 

 es slightly divergent from the main stem 

 a few feet fro^^ the ground: 5-7 raiial 

 sp'ne? one-fcurth to three-fourths inch 

 long. 1 central ^-2 inches long, rarely a 

 s'Tcr er central or raiial above; radials 

 latera'lv disposed except the 'owest, all 

 ashy black. Ribs 11-13 in young plants, 

 obtuse with shallow intervals. Te-te-cho 

 of the Mexicans, who describe the fruit 

 as s^' eet ard fd'ble, the flower as red. 

 States of Puebla and Oaxaca, Mexico 

 rOrcutt 270«). 

 C. Hoppenstedtii KS, ia Pilocerus Hop- 



penstedtii Web flde KS. 

 C. MACROCEPHALL'S Web. 

 C. MELOCACTUS KS. 

 C. SENILIS Pf. 



Genua CERBUS Haworth. 



"Flowers about as long as wide or elon- 

 gated. Scales of the ovary d'stinct, with 

 naked or woolly axils, or almost obsolete 

 and the axils spiny. Berry succulent, 

 covered with spines or scales or almost 

 naked. Seeds black, without albumen. 

 Embryo short and straight or curved or 

 horkei; coty edohs usually contrary to 

 the sides of the seed.— Plants of all sizes, 

 low or climbing or erect, sometimes enor- 

 mous: srln^-bearing areo'ae on vertical 

 ribs. Flowers from the older or, at least, 

 fully formed parts rf the plant, not from 

 ary preformed areo'a, but hur sting 

 through the epidermis .iust above the 

 bunches of spines; some open only in sun- 

 light, others only at right, others again 

 are not thus influenced. Fruit often edi- 

 ble, sometimes of very large size."— E. 



Subeenus EUCEREUS. ; "Prismatic or 

 cylindtlc, mostly branching: flrwers usu- 

 ally longer than wide: stigmas wh'tish: 

 seeds obovate, usually smooth or pitted: 



embiyo with fol aceous curved coiyle- 

 dons."— E. 



CEJRE^S OOLrUBRINUS Otto. 



CEREUS ACULEATUS Otto. 

 CBREUS ALAMOSENSIS Coulter. 



Sina spinosa of Sonora; 2-8 feet high, 2- 

 10 branches from the base with joints 1-1 

 feet long, flexuous or decumbent, often 

 forming arches and rooting at the joints, 

 and thus spreading over wide areas, some- 

 times 100 feet in diameter or more; ribs 

 about 7, slightly tuberculated. The bright 



