64 MAGNOLIACEiE. 



these are dry and indehiscent, lanceolate, somewhat ligne- 

 ous, consisting of a small, laterally compressed pericarp, 

 which is strongly 4-ribbed ; the ventral and dorsal ribs form- 

 ing the axis, and the lateral ones confluent into the margins, 

 of the large and wing-like obcompressed style. Seeds 2, or 

 by abortion solitary, pendulous ; the thin testa dry and cori- 

 aceous, marked with a narrow salient raphe. Albumen fleshy. 

 Embryo minute, next the hihun ; the radicle superior. 



A Tree of large size and elegant aspect ; with the smooth 

 leaves alternate, long-petioled, feather-veined, deciduous, an- 

 gulate-four-lobed, and appearing as if truncate at the apex 

 by a broad and shallow notch. Flowers solitary and termi- 

 nal, very large (greenish-yellow marked with orange), in the 

 bud inclosed by the last pair of stipules in the form of a two- 

 valved caducous spathe. Vernation as in Magnolia, except 

 that the oval stipular buds are compressed and very obtuse, 

 and the leaves are bent down on the petiole so that their 

 summits are brought to the base of the bud. Stipules nearly 

 flat, oblong, obtuse, free from the petiole, deciduous. 



Etymology. Name compounded of \ipiov, a lily or tulip, and hivhpov, 

 tree ; from the tulip-like flowers. 



Properties. Same as of Magnolia; but the bitter, tonic bark is less 

 aromatic. The light, fine-grained wood is largely used by cabinet-makers, 

 &c, under the name of White-tvood, or White and Yellow Poplar. 



Geographical Distribution. Nearly throughout the United States 

 proper, in rich soil, attaining the greatest size in Ohio, Kentucky, &c. 



PLATE 25. Liriodendron Tulipifera, Linn. ; — branch in flower ; also 

 with an unfolding leaf-bud : natural size. 



1 . Diagram of the aestivation of the calyx and corolla. 



2. Longitudinal section through the receptacle, pistils, &c. ; natural size. 



3. A detached pistil, natural size. 



4. Summit of the same, magnified ; showing the stigma. 



5. Vertical section of the ovary, magnified ; showing the ovules. 



6. 7. Ovules, magnified. 



8. Ripe cone of fruit ; natural size ; the lowest carpels fallen. 



9. One of the separated carpels. 



10. Vertical section of the pericarp, through one of the seeds; magnified. 



