STANDLEY TREES AND SHRUBS OF MEXICO, 575 



Pubescence of the stems of spreading hairs 1. A. hirtella. 



Pubescence of the stems of appressed liairs. 



Cleistogamous flowers sessile in tlie axils 2. A. hyssopifolia. 



Cleistogamous flowers pedunculate. 

 Peduncles of the cleistogamous flowers nearly or quite as long as the leaves. 



3. A, longipes. 

 Peduncles of the cleistogamous flowers much shorter than the leaves. 

 Leaves 4 to S mm. wide, thinly strigose or glabrate beneath. 



4. A. humilis. 

 Leaves 10 to 30 mm. wide, densely sericeous beneath 5. A. lanata. 



1. Aspicai-pa hirtella Rich. Mem. Mus. Hist. Nat. 2: 399. 18L5. 

 Aftpicarpa tirens Lag. Gen. & Sp. Nov. 1. 1816. 



Acasmiis pruriens Desv. ; Desf. Cat. PI. Paris, ed. 3. 233. 1829. 



Zacatecas and Jalisco to Mexico. 



Stems scandent or reclining, hirsute with stinging hairs ; leaves oval-ovate, 

 1.5 to 3.5 cm. long, rounded to acutish at apex, cordate or snbcordate at base ; 

 larger petals about 1 cm. long. 



2. Aspicarpa hyssopifolia A. Gray, Bost. Joui'n. Nat. Hist. 6 : 167. 1850. 

 Western Texas, along the Rio Grande, and douI)tless also in Coahuila or 



Nuevo Leon. 



Stems 10 to 30 cm. high ; leaves mostly linear or lanceolate, 1 to 2.5 cm. 

 long, acute ; larger petals 5 to 7 mm. long. 



3. Aspicarpa longipes A. Gray, PI. Wright. 1: 37. 18.12. 



Sonora to San Luis Potosi and Quer^taro. Western Texas and southern 

 Arizona ; type from Texas. 



Stems 1 meter long or less, sometimes scandent ; leaves ovate or oval, 1 to 

 4.5 cm. long, cordate or subcordate at base. 



4. Aspicarpa humilis (Benth. ) Juss. Arch. IMus. Hist. Nat. (Paris) 3: 597. 1844. 

 Gandichaudia humilis Benth. PI. Hartw. 6. 1839. 



Aspicarpa hartwegiana Juss. Ann. ,Sci. Nat. II. 13: 253. 1840. 

 Chihuahua and Durango to San Luis Potosi ; type from Aguascalientes. 

 Low ascending shrub ; leaves ovate to oblong-lanceolate, 1 to 3 cm. long. 



5. Aspicarpa lanata Rose, Contr. U. S. Nat. Herb. 8: 49. 1903. 

 Durango, Jalisco, and Zacatecas ; type from Guadalajara, Jalisco, 

 Densely pube.scent shrub, 20 to 70 cm. high ; leaves often whorled, oblong to 



oval, 3 to 6.5 cm. long, acute to rounded at apex ; petals yellow, 6 to 9 mm. 

 long. 



14. BANISTERIOPSIS C. B. Robinson; Small, N. Amer. FI. 25: 131. 1910. 



Scandent shrubs ; leaves opposite, entire, petiolate ; flowers large, paniculate, 

 the calyx with 8 or 10 glands, or glandless ; petals dentate or lacerate ; fruit of 

 3 or fewer samaras. 



Leaves lanceolate or oblong-lanceolate, glabrous 1, B, acapulcensis. 



Leaves oval or broadly ovate, sericeous 2. B. argentea, 



1. Banisteriopsis acapulcensis (Rose) Small, N. Amer. Fl. 25: 132. 1910. 



Hcteropteris acapulcensis Rose, Contr. U. S. Nat. Herb. 5: 139. 1897. 



Known only from the type locality, Acapulco, Guerrero. 



Leaves 7 to 15 cm. long; larger petals 5 to 5.5 mm. long; samaras 2.5 to 

 3 cm. long. 



