TETRADYNAMIA. 191 



One to one foot and a half high, leafless. Whole plant (Ungy purplish 

 brown, pubescent. Slem swelling at the base, and very scaly ; 

 scales more distant upwards ; these become bracteas among the 

 flowers, 1 at the base of each. Flowers in a long spike. Cul. of 

 two, lateral, lanceolate leaves. Car. large. 



2. O. rubra {red Broom- Rope), stem simple, cor. tubular its 

 upper lip 2-lobed lower one in 3 equal obtuse lobes, stam. 

 partially glanduloso-pilose, style glabrous. E. B. t. 17S6 

 {Lad fig.). Hook, in Fl. Land. New Series, t. 105. 



Hab. BasT.ltic rocks, Stafi'a, Messrs. Turner, Borrer and Hook. 

 Near Kirkcaldy (E. side of the hollow, near Seafield town, where 

 it was long mistaken for the O.viajor, Mr.Arnott''), JVh .Somcrville 

 and Mr. E. I. Mauglum. Fl. July. 1/? 



Eight to ten inches high. \Vhole plant a fine purplish red, piloso- 

 glandulose. Cal. of 2, entire, lanceolate leaves. — I know not the 

 nature of the subsoil at Kirkcaldy, but every other station at present 

 known for this plant, in Ireland as well as Scotland, is ba.saltic. 



XV. TETRADYNAMIA. 



1. SILICULOSA^ 



1. Cakile. Po//c/i of 2 single-seeded articulations ; upper arti- 

 culation with an erect sessile seed; the lower one with a pen- 

 dulous seed (sometimes abortive). Br. 



2. Crambe. Pouch with the upper articulation subglobose : its 

 seed inverted, fixed to the base of the cell by its (long, curved) 

 seedstalk ; the lower articulation abortive, resembling a pe» 

 dicel. Br. 



3. CoRONopus, Po?/c/i 2-lobed, without valves, vvingless ; cells 

 1- seeded. Cotyledons incumbent, linear. Br. 



=* This gentleman informs me that I am mist^iken in having given, in Fl. 

 Loiifl., SaUsburij cruigs as a station for this plant. 



'' No one who has at all studied the genera of plants needs he told 

 how difficult it was, nay, I may say impossihle, to distinguish those of this 

 very natural family by the characters that had heen given of them prior to 

 the publication of the 4th vol. of Hortiis Kewcims ; where i\Ir. Brown has 

 given an entirely new arrangement of the family. His genera and charac- 

 ters I have adopted : but I still fear, from the minute part of the fructifica- 

 tion {the emljri/o), which is here, v.-ith great propriety, brought forward, as 

 affording important distinguishing marks, that the student may shrink from 

 the task of investigation. The diiliculty, however, is more in appearance 

 than in reality. The onbryo being surrounded by no aiinmen, offers itself 

 to examination immediately upon breaking the external coat of the seed, 

 and the distinction between uccinnbent and imnnibent cotyledons' will he 

 apparent. In the former case the back of one of the cotijlcdans is applied to 

 the curved radicle ; in the latter the edges or margins of the cotijlcdoiis are 

 applied to it. 



