TI ON 



149 



escence terminal, pyramidal, compound, of many clustered and short and 

 scorpioid racemes seldom an inch long. Flowers white, about 5 mm. long, 

 slightly funnel form, the hairy tube 4 times as long as the very broad 

 lobes, and 2-3 times as long as the calyx whose lobes are linear and longer 



than the tube. 



ppressed 



hairs. No. 23134, Acaponeta, Nayarit, February 26, 1927, growing on 



slopes and hills. 



Evolvulus ramulosus N. Sp. Apparently an annual or short-lived 

 perennial, ramulosely branching and straggling over the ground, with innu- 

 merable and rather canillarv branches with short internodes. Leaves oval 



appressed 



petiole 



whole plant, including the corolla. Pedicels 4-6 mm. long and reflexcd 

 and capillary. Sepals ovate and acute, about 2 mm. long and as long as 

 the widely open and blue corolla. Pods depressed globose, a little longer 



than the sepals. 



smooth. No. 23135, Tepic, 



Nayarit, February 12, 1927. Growing in open places. 



Ipomoea equitans N. Sp. A closely twining and perfectly smooth 

 vine, with long internodes. Leaves very deeply cordate-ovate and shortly 

 acuminate, 1-2 inches long by an inch wide, entire, with the sinus com- 

 pletely closed and edges overlap and equitant on the elongated peduncle 

 which is nearly 1 dm. long. Petiole very stout and 2-4 mm. long, ores 



few 



appea 



f 



ing as if on a one-sided raceme on cachbranch, with minute bracts. Pedi- 

 cels 1-2 cm. long, capillary and enlarged a little upward. Flowers an 

 inch long, orange, funnelform, about half an inch wide above and gradu- 

 ally enlarged upward. Calyx split to the base, with trangular lobes nearly 

 linear and 3 mm. long and green, spre-^ding in fruit, smooth. Fruit oval. 

 5 n..J. long, smooth, apiculate. Seeds ^arly oval, 3 mm. long, niottled. 

 finely pubescent. Tigre mine near _ A atponeta Nayarit, March 1. 19^7. 

 Tbi.- would appear to be near I. Wrigltii. 



Buttneria trilobata N. Sp. Slender and erect shrubs about a yard 

 Incrh with chestnut-colored stems racemosely branched above. Outline o. 

 1 ave^ ovate to deltoid-triangular and 3-lobed, would be hastate if th< 

 h-he?. were sharp but they are rounded, about 4 cm long by 2-3 cm 

 -ide. shortly acuminate, nearly equally crenate throughout, green, smooth 

 i,ut minutely papillose above, lighter below and very sparsely stellate- 

 pn'opccent. Leaves reduced above. Flowers yellow, about 6 mm long, .n 

 Mrail umbels in the axils and without peduncle to the umbel Fruit^ 

 "r.fl^"ced on slender pedicles not 1 cm long, nearly globose, sparsely prukly 

 r,!-nve the middle and prickles about 2 mm. long, fruit 4 mm. lon^. 

 nrlnntelv roughened. No. 22538, Mazatlan, Sinaloa, November 20, 1926. 



While botanizing in Mexico my attention was attracted to certain 

 nri.graceae, such as Lopezia, and Semeiandra, in the specializing of parts. 

 This was again recalled in studying .various Godetias m cultivation last 

 T a" Now' 1 find the same tendency in Clarkia elegans, and I do not 

 di cover anv reference to these facts in any publications. The peculiari- 



