l(i 



NATURAL HISTORY OF PLANTS. 



above and within stigmatic papillie. In each ovary cell, of which 

 one is posterior and the other two anterior, there is in the internal 

 angle a single dcscendent anatropons ovnle, with micropyle directed 

 upwards and outwards.' The fruit is formed of three achenes, which 

 are detached from the central axis at maturity presenting a cby, 



sometimes very thick, more 



Ti-oiKBolum {C/ii/mocarjiiis) pentaplujUum. OX leSS SpOUgy iudehlSCOnt 



monospermous pericarp. 

 Under the coats of the seed 

 is contained a fleshy em- 

 bryo, the thick plano-convex 

 cotyledons surrounding by 

 their base a short superior 

 radicle. In some Nastur- 

 tiums of which the genus 

 Ghymocarpus " has been 

 made (fig. 38, 39), the an- 

 terior petals are wanting or but little developed, and the fruit is 

 more fleshy than in the other species. This genus contains some 

 thii-ty species,^ all herbaceous, sometimes climbing, fleshy, sapid, 

 with alternate, petiolate, peltate or palmate leaves, angular, lobed or 

 dissected, exstipulate or more rarely accompanied by small setiform 

 or dissected stipules. The flowers ^ are axillary, solitary or peduncu- 

 late. All are natives of South America, especially of the temperate 



Fig. 38. riowor. 



Fig. 39. Long. sect. 

 of flower. 



' It has two coats. Upon tlie phenomena of 

 fecundation in the Nasturtiums ; upon tlieir 

 embryonal sac, and the curious tubular (liver- 

 ticiiliim en ciil de sac which this emits across the 

 ovule, on its hack and a little holow and outside 

 the micropyle, see : Schleiden, in Nov. Act. 

 Nat. Cur. xix. 54, t. 8. — Schacht, in Ann. Sc. 

 Nat. ser. 4, iv. 47. — Wilson, in Hook, Loiiil. 

 Joiirn. ii. 623. — Gm. in Trans. Linn. Soc. xix. 

 ICl. — A. Dickson, in Edinb. New Phil. Journ. 

 XV. (1863), t. 4. 



2 Don, in Trans. Linn. Soc. xvii. 13, 145. — 

 ScHLEiD. in Nor. Act. Nat. Cur. xix. 66, t. 8, 

 fig. 126.— Enul. Gen. n. 6062.— H. B.v. Payer 

 Fam. Nat, 403. — MacjulUiiiH Cav. Icon. t. 344 



(excl. fruct.).— DC. Prodr. i. 684.— Enul. Gen. 

 n.6061. 



3 Cav. Iron. t. 395. — Jaco. llort. Seliwnbr. t. 

 98.— E. et Pay. Fl. Per. iii. t. 313, 314.- Pei:s. 

 Enchind. i. 4(15.— A. S. H. PI. Vs. Bras. t. 41, 

 43 ; Fl. Bras. Mer. i. 95.— Piepp, et E.n-dl. Nov. 

 Gen. et Spec. i. t. 3o-3». — Link, Kl. et Ott. Ic. 

 Fl.Rar. t. 17. — Andu. in Bot. Rspos. t. 617, 

 635.— C. Gay, Fl. C/iil. i. 407.— Kabst. Fl. 

 Columli. i. 145, t. 12.— Bot. Mag. t. 23, 98, 3169. 

 3190, 3844, 3851, 3985, 4042, 4097, 4245, 4323, 

 4337, 4385.— Walp. Pep. i. 465; ii. 820; v. 

 381 ; Ann. i. 142 ; ii. 237 ; iv. 397 ; vii 492. 



■* Yellow, red, purple or hluish. 



