50 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Reported (A. DC, loc. cit.) to be used as a remedy for snake bites. 



3. Zamia cycadifolia Dyer in Hemsl. Biol. Centr. Anier. Bot. 3: 195. 1883. 

 Described from Mexico, probably from Veracruz. 



Leaves bright green ; pinnae linear, 12.5 to 20 cm. long, 6 to 12 mm. wide. 



4. Zamia leiboldii Miquel, Linnaea 19: 427. 1845. 

 Described from Colipa, Veraemz. 



Trunk very short ; petioles 20 to 30 cm. long, the pinnae 28 to 44, 15 to 28 

 cm. long, 10 to 12 mm. wide ; pistillate cone 5.5 cm. long. 



5. Zamia lawsoniana Dyer in Hemsl. Biol. Centr. Amer. Bot. 3: 195. 1883. 

 Oaxaca. 



Pinnae 50 or more, 22 cm. long or shorter, 8 mm. wide; staminate cone 6.5 

 cm. long, 2.5 cm. thick. 



6. Zamia loddigesii Miquel, Tijdsch. Nat. Gesch. 10: 73. 1843. 

 Zamia mexicana Miquel, Prodr. Cycad. 13. 1861. 

 Southern Mexico, the locality not indicated. Guatemala. 

 Pinnae about 19 cm. long. 



4. TAXACEAE. Yew Family. 



1. TAXUS L. Sp. PI. 1040. 1753. 

 1. Taxus globosa Schlecht. Linnaea 12: 496. 1838. 



Forests of Veracruz, Hidalgo, Mexico, and Oaxaca ; type from Real del 

 Monte, Hidalgo. 



Tree, 6 meters high or probably larger; leaves linear, cuspidate, 2 to 3,5 cm. 

 long ; seed nutlike, seated in a fleshy red cup-shaijed disk. 



The other North American si^ecies of yew have hard strong elastic close- 

 grained reddish wood, with a si:)ecific gravity of about 0.64. The leaves 

 and seeds of the various species contain a poisonous alkaloid, taxine ; the bark 

 is rich in tannin. 



5. PINACEAE. Pine Family. 



Trees or shrubs ; leaves usually evergreen, alternate, opposite, verticillate, or 

 fasciculate; flowers monoecious or dioceious; fruit a dry or somewhat fleshy 

 cone, composed of few or numerous scales. 



Leaves fasciculate (rarely solitary), with a sheath at the base 1. PINXJS. 



Leaves solitary, without a sheath. 

 Leaves linear, 1 cm. long or larger. 

 Cones globose, with few thick scales; leaves deciduous— 4. TAXODITTM. 

 Cones elongate, with numerous thin scales; leaves persistent. 



Cones pendulous, the scales persistent 2. PSEUDOTSUGA. 



Cones erect, the scales deciduous 3. ABIES. 



Leaves scalelike, mostly 3 mm. long or shorter. 



Fruit baccate, indehisceut 5. JUNIPERTJS. 



Fruit a dry cone, dehiscent. 



Leaves opposite ; cone scales peltate 6. CUPRESSUS. 



Leaves in whorls of 4 ; cone scales oblong, not peltate. 



7. lilBOCEDRUS. 

 1. PINUS L. Sp. I'l. 1000. 17.'i3. 



Rp:ferknce : (J. R. Khaw, The pines of Mexico, pp. 1-29. pi. 1-22. 1909. 

 The pines ai-e i)erhaps the most imiwrtant genus of Noi'th American trees. 

 They are certainly the most important group of lumber trees, the wood, varying 



