PLANTS EXOGENiE. 22S 



Utriculus; perisperm farinaceous; 



leaves naked at the base CHENOPODE^. 16. 



Pyxidium 1-celled, 1 -seeded; 



styles 3 ; stamens 3 or 5 AMARANTHACEiE. 17. 



Regma 2 or 3-coccous EUPHORBIACE^. 10. 



Samara; stamens 3 to 6 ULMACE^. 8. 



Drupe ; stamens 8 THYMELEiE. 14-. 



Drupe ; stamens 4: ELiEAGNE^. 13. 



D. Flowers hermaphrodite ; ovary adherent. 



Stamens hypogynous ; drupe P globose 



SANTALACE^. 12. 

 Stamens epigynous ; carcerule 6-celled 



ARISTOLOCHI^. 11. 



Fam. I. 1. ABIETIDEiE. 



Flowers unisexual.— Male. Scales of the anient imbri- 

 cate; anthers 1, sessile, 2-celled. — Female. Scales of the 

 strobile many, imbricate, 2-flowered; ovaries 2, on the 

 axillae of the scales ; style deflexed ; stigrr^a near the base of 

 the ovary; nucula 1-celled, winged; kernel pendulous; peri- 

 sperm fleshy ; corculum central, straight ; cotyledons many ; 

 radicle above. — Trees resinous; leaves biennial, slender, 

 acerose, opposite, verticillate or fascicled. 



Scales of the cone clavate, angular; 

 leaves biennial, 2 together Pinus. 1. 



Scales of the cone slender, rounded; 

 leaves biennial, single Abies. 2. 



Scales of the cone slender, rounded ; 

 leaves annual, in bundles Larix. 3. 



Gen. I. 1. PINUS. Pliny. Pine. 



Monoicous. — Male. Ame?it racemose, compact, termi- 

 nal, scaly ; stamens 2, on the tip of the scales of the ament ; 

 anthers 1-celled. — Female. Ament simple, imbricate; scales 

 pointed ; ovaries 2 ; stigmata 2, 3-cut ; lobes tailed ; scales 

 of the cone oblong, clubbed, woody, imbricate; tip angu- 

 lar; nucules 2 on each scale, covered with a membranaceous 

 appendage; cotyledons 4 to 8. — Tree; branches verticillate; 

 luds large ; leaves biennial, 2 or 3 from the same sheath. 



Pinus sylvestris. Wild pine. 



Leaves in pairs, stiff; cones generally in pairs, ovate, co- 

 nical, acute, as long as the leaves, rounded at bottom ; lips 

 of the scales (especially of the lower ones) very pyramidical. 



