62 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



rouKli checkered bark, this species is known in the United States as alligator 

 juniper. 



3. Juniperus flaccida Schlecht. Linnaea-12: 495. 1838. 



Chihualiua and Sonora, southward ; type from Atotonilco El Chico. Guate- 

 mala ; western Texas. 



Shrub or tree, sometimes 12 meters high, with slender, spreading or drooping 

 branches ; fruit subglobose, reddish brown, 1.2 to 1.6 cm. in diameter, with dry 

 flesh. " Cedro Colorado " (Veracruz); "cedro" (Durango). 



4. Juniperus mexicana Spreug. Syst. Veg. 3: 909. 1826. 



Cupressus saHnoides H. B. K. Nov. Gen. & Sp. 2: 3. 1817. Not Juniperui 

 sabinoides Griseb. 1844. 



Juniperus tetragona Schlecht. Linnaea 12: 495. 1838. 



Juniperus deppeana Steud. Nom. Bot. ed. 2. 835. 1840. 



Nearly throughout Mexico, except along the northern part of the Pacific 

 coast. Guatemala ; western Texas. 



Shrub or tree, sometimes 30 meters high, with a trunk diameter of a meter 

 or more; in Mexico sometimes ascending to an altitude of 4,500 meters, and 

 then a low shrub ; trunk short or tall, the thin bark separating into fibrous, 

 reddish brown scales ; twigs 4-sided ; fruit 6 to 8 mm. in diameter, dark blue, 

 glaucous, with thin sweet resinous flesh ; wood hard, weak, close-grained, 

 brown, its specific gravity about 0.59. " Sabino " (Chihuahua, Hidalgo, Mex- 

 ico, etc.); " enebro " (Oaxaca, Reko) ; " tascate " or " taxate " (Durango, 

 Chihuahua). 



The wood is used for general construction, fence posts, telegraph poles, rail- 

 road ties, etc., and for fuel. Palmer states that the ashes of the bark are used 

 in the preparation of corn for tortillas. 



Some of the specimens placed here may be referable to J. monosperma 

 (Engelm.) Sarg., but in the herbarium material examined it is impossible to 

 distinguish more than a single species. 



6. CUPRESSUS L. Sp. PI. 1002. 1753. 

 Tree or shrubs, closely resembling the species of Juniperus, but with larger 

 cones, these opening when ripe and shedding the seeds ; leaves opposite, small 

 and scalelike. 



The species of cypress are often cultivated for ornament. C. sempervirens 

 L., of the Old World, is said to be cultivated in Mexico. 

 Seeds not winged, 2 or 3 to each scale ; leaves not appressed. Cones about 2.5 



cm. in diameter 1. C thurifera. 



Seeds narrowly winged, 5 to 8 to each scale ; leaves appressed. 



Cones 2.5 to 3.5 cm. in diameter 2. C. g'uadalupensis. 



Cones 1.2 to 2.5 cm. in diameter. 



Branchlets stout, stiff; leaves glaucous 3. C. arizonica. 



Branchlets slender; leaves green 4. C. benthamii. 



1. Cupressus thurifera H. B. K. Nov. Gen. & Sp. 2: 3. 1817. 



Veracruz and Oaxaca ; type from Tasco and Tehuilotepec, at 1,750 meters. 



Shrub or large tree. "Cedro" (Veracruz) ; "cedro de la sierra" (Durango, 

 Veracruz, etc.); " cipr6s " (Veracruz); "cedro amarillo," " gretado amarillo " 

 (Oaxaca, Rcho) ; "tlatzcfln" (Herrera). 



2. Cupressus guadalupensis S. Wats. Proe. Amer. Acad. 14: 300. 1879. 

 (Juad.'ilupe Isljuid, Baja Caiif'ornia. 



Widely spreading tree, averaging about 12 meters in height, but sometimes 

 larger and with a trunk 7.5 meters in circumference; bark brown, curling into 

 thin plates; wood whitish. 



