13;^ CONTRIBUTIDKS TO WESTERN BOTANY NO. fJ 



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linear leaves smcf somewBat smaller flowers. Also my No. 228, got af 



Pastbrnlo, Zacatsccas, Mexico, May 2; 1892; Though this has the flmvei^ 

 sessile and a litdV wider leaves. This 15 not the same as altemi folia nor 



^ . . Mamillana, San Jose del Cabo, January tS; I92S. This plant grows 

 Ji^\granite Jbills aliMig with Echinocactus Falconeri, Cereus, Opuntia, cfe. 

 The stems axe single or in small tufts of rarely 6. It is a few inches to 



*a Joot high, nearly erect, 3 inches wide. Flowers near the tip but hev^r 

 .on the.tjp, j^eenish-w:hite, ^ inch long, only partly open. PetaU not 

 ■JaV^rate^ nearly linear, the. outer ones reddish and striped in the middle. 

 "Trurt UniearHcIavate, oranee colored, 44 inch Icmg. Central spine shortly 

 .and sharply hooked. 



^^^^ Cereus Pringlei Watson;. East of San Jose del Cabo, along the rcJad 



.^itpd InTblbttn. Ri^ l6-I2' with ^ wide scallop between. Trunk varies 



*ffornl]642T.W more inches thick, and 30 feet more or less high, always 



J^hiH^af tip^ V Old ^^ bald at tip (whence the name calvus), a few 



Individuals have wKiskers toward the top (like the viejo cactus). Flowers 



V^pen in the forenoon, dark-purple on the outside and nearly always closed, 



J^^^^ .oj^n the insi^ is while and" tips of petals recurved. The fruit is 



^i*n oblately'^^^ innumerable yellow spines felted together. 



TTjereis ii^^^c^^ branch below the middle, candela- 



trum-lik^,^a t^ offsiets -tihe same size as the trunk. This has been called 



.Cl^eus titan, and G. catvus, but there fs but one species. 



,>;7 Cei^ij5..T]hurbe|*i. This trim and neat species has a much smaller 



jnip^,and„ brandies near the base into several to many organ-like pipes 



^7it^ms) \^^ at the tip. The ribs are about 16-20 and close-set, 



^the.iui^k .4r6 inclies; wide and sometimes 20 feet high, but rarely over 15 



[jt.e^^ fiigh^ aJn^ with a distinct trunk tfiough very short before it 



^l^rVrxhes/ . It is.. ,a ■ very vigorous grower. The aureoles are black and 



jpincs;;^?lack...,This is scarc^^^^ 3,500 feet altitude on the Laguna 



mountains... ,But i?^ the iBost comnion cactus south of Nogales.. 



The 



per- 





^^'; ,V!^f kfP'^^'^^s Falctwifiri. . . San Jose, del Caba, January 23, 1928. 



> fc- '^i ;*.'?. ??^9oth, globqlar,. J^ inch long, green but at lasf yellowis.h, 



'^?:y^- v.^uTQO^^s a little woolly, central spine erect, sharply "^ hooked at the 



^AC,-- hr>'. much corrugated. . The lateral spines are ^'stiff hairs and white. 



^The main -^piiie .is. darker. WJiole plant is. bluish- pr^en, plants ? f fft 



f'W^ ?P^ a fopt.,wide. , .This is- occasional through the Gape f^gion o« dry 



■J: ..Antigonum .leptopus Bth. Perianth with parts inserted at bast, the 

 4^'^S^.P^^^^ larger, and developing in age. Stamens 8, on a raisK-d'atid 

 t^liT^^^v.S'o^^^ir and. yvith apparently abortive inner ones like teeth. Anthers 

 . Wcufvcd and very wi«Je, yellow. Styles 3, and with horse-shoe stigmds 



\'p^'^T.^^^ ^^^ yellow. Young leaves softly pubescent. No. 24006; San 

 Jipe. del Cabo, January, 1928. ' . . " 



': .- Planta.^o hjrtclla var. annua. N. Var. Plants annual. About 6 indnis 



^ieh and. slender.. Leaves 3-nerved, linear-elliptical, about 4 inches, long, 



^?'"^J.:? .and. acutish surpassed by the peduncles. Spikes-" 2-4 inches l«ng, 



barrowly linear, daise. Cal^Tt lobes straigly 3-nerved and pilose on Ae 



