TILIAGB2E. 



169 



Christiana africana. 



Beside this genus are placed six others, having flowers similar 

 in exterior, and only differing from them in some details in the 

 organization of the flower and fruit. Christiana (tig. 178) has a 

 fruit of five monospermous follicles, 1 but the seeds have an albumen 

 and the stamens are fertile. Diplodiscus has the androceum and 

 carpels of Broionlowia ; but the latter are united below into a 5- 

 celled ovary. It is the same in Pentace, but its indehiscent and 

 monospermous fruit is furnished with from three to five vertical 

 wings. In Pytiranthe the ovules are descen- 

 dent and the fruit is also provided with longi- 

 tudinal wings but little developed ; but it is 

 capsular and five-valved. Berrya has the an- 

 droceum of Christiana, and a capsular fruit 

 with three or four valves, but the cells are 

 pluriovulate, and each of them bears in the 

 fruit a pair of vertical ascending wings. 

 Finally, in Carpodiptera the flowers are poly- 

 gamous and dioecious ; the ovary cells only 

 contain one descendent ovule each ; the style 



is dilated into a large stigmatiferous, almost petaloid extremity ; 

 and the capsule, generally bivalved, is furnished with four vertical 

 wings. All the plants have moreover nearly the same vegetative 

 organs as Brownloioia. 



Fig. 178. 

 Dehiscent fruit. 



II. LIME SEEIES (Fr., Tilleuls). 



The Limes 2 (figs. 176, 179-184) have regular hermaphrodite pen- 

 tamerous flowers. If we examine, for example, those of the Common 

 Lime, 3 we shall see, upon the convex receptacle, five valvate sepals 



1 And in this way they would hest represent 

 the type of this series ; but in their perianth, 

 until now little known, there is said to be an 

 inequality in the number of the pieces of the 

 calyx and of the corolla. The flower would 

 therefore in this respect be less regular. 



2 Tilia T., Inst., 611, t. 381.— L., Gen., n. 

 660. — Adans., Fam. des PL, ii. 382. — J., Gen., 

 292.— Gjeetn., Fruct., ii. 150, t. 113. — Poir., 

 Diet., vii. 676; Suppl., v. 312.— Lamk., III., 

 t. 467.— Tuep., in Diet. Sc. Nat., Atl., t. 147. 

 — DC, Prodr., i. 512.— Spach, Suit, a Buffon, 



iii. 15. — Endl., Gen., n. 5373. — Payee, Or- 

 ganog., 20, t. 4. — A. Geay, Gen. III., t. 136. 

 — H. Bn., in Pager Fam. Nat., 274. — B. H., 

 Gen., 236, 986, n. 24. — Eocq., in Adansonia, 

 vii. 31.— Lem. & Dcne., Tr. Gen., 340. 



3 T. sglcestris Desf., Cat. Rort. Par., 152 

 (ex Spach, Revis. Til., 3, n. 1). — T. uhnifolia 

 Scop. — T. eicropcea borealis Wahlenb. — T. 

 microphglla Vent., Diss. Til., t. 1, fig. 1 (ex 

 Spach). — T. parvifolia Eueh., Beitr., v. 159. 

 — Koch., Sgn., 145. 



