268 



CRUCIFER/E. CVII. SUBULARIA. CVIII. PLATYPETALUM. 'CIX. BRACHYCARP^EA. CX. SCHIZOPETALON. 



kinds should be sown in pots early in the spring, and placed either 

 in a green-house or gentle hot-bed ; and in May the plants should 

 be planted out into the open border, in a warm dry situation. A 

 light sandy soil will suit them best. The green-house species 

 are all little shrubby plants, and grow freely in a mixture of sand, 

 loam, and peat. They may be either increased by seeds, or 

 young cuttings will root readily if planted in a pot of sand, and 

 then placed under a hand-glass. 



Tribe XX. 



SUBULARIE N ^ (plants agreeing with Subularia in some 

 characters), or DIPLECOLO'BE^E (see Sub-Ord. V.) LATI- 

 SE'PT/E (from latus, broad, and septum, a partition ; dissepi- 

 ment broad.) B.C. syst. 2. p. 697. prod. 1. p. 235. Silicic 

 oval, (f. 47. ra.) with an elliptical dissepiment, convex valves, 

 many-seeded cells, and a sessile stigma, (f. 47. .) Cotyledons 

 plaited twice cross-wise, (f. 45. m, f. 47. p.) 



CVII. SUBULA'RIA (from subula, an awl ; form of leaves.) 

 Lin. gen. no. 799. D. C. syst. 2. p. 697. prod. 1. p. 235. 



LIN. SYST. Tetradynamia, Siliculosa. Silicle oval, with con- 

 vex valves, and 4-seeded cells, (f. 47. n.) and a sessile punctiform 

 stigma. Calyx closed. A little aquatic, stemless herb, with fas- 

 cicular, simple, white, fibrous roots. Radical leaves linear, awl- 

 shaped. Scapes naked, few-flowered. Pedicels filiform, bract- 

 less. Flowers small, white. 



1 S. AQUA'TICA (Lin. spec. 896.) Q. H. Native of the 

 colder parts of Europe, in ditches, lakes, rivulets, and rivers, 

 with a sandy or gravelly bottom ; viz. Lapland, Sweden, Nor- 

 way, at Petersburg along the Neva, Germany, &c., plentiful in 

 the north of England, Scotland, and Ireland. Oed. fl. dan. t. 

 35. Smith engl. bot. 732. Schkuhr handb. 2. no. 1762. t. 180. 

 Braba subularia, Lam. ill. t. 556. f. 3. Dr. Hooker has con- 

 firmed Sir James Smith's account of the flowers always being 

 several feet under water, where he observed them to be con- 

 stantly expanded, so that the impregnation actually takes place 

 in that element. The leaves are about 8 or 10 lines long, awl- 

 shaped. 



Aquatic, or Common Awl-wort. Fl. June, July. Britain. 

 PI. 1 to 2 inches. 



Cult. This curious little plant only requires to be planted or 

 sown in a pond or rivulet, with a sandy or gravelly bottom ; or 

 it may be preserved in a pot filled with gravel or sand, and then 

 plunged in water. 



CVIII. PLATYPE'TALUM (from irXarwe, platys, broad, 

 and TrtraXoc, pelalon, a petal ; petals broad.) R. Br. in app. 

 Parry's voy. p. 8. 



LIN. SYST. Tetradynamia, Siliculosa. Silicle oval, with con- 

 vex valves, crowned by a short style. Seeds numerous in the 

 cells, disposed in two rows. Calyx spreading. Petals dilated. 

 Plants with the habit of Braya, which it agrees with in the 

 structure of the flowers, and in the cotyledons being incumbent. 

 To Subularia it is more nearly allied, in the cotyledons being 

 narrow and 2-legged. 



1 P. PURPURA'SCENS (R. Br. 1. c.) stigma 2-lobed, spreading ; 

 style manifest ; scape naked, or furnished with 1 -leaf, pubes- 

 cent ; pods smoothish. Tf.. H. Native of Melville Island. 

 Root fusiform, with numerous short undivided stems, rising from 

 its neck. Stems short, naked at the base, but leafy at the top. 

 Leaves oblong, bluntish, usually quite entire, thick, rather pilose 

 at the top. Calyx purplish ; petals white, with a faint tinge of 

 purple. Flowers 4 to 6, in a bractless corymb. 



Purplish-flowered Platypetalum. PI. i foot. 



2 P. DU'BIUM (R. Br. 1. c.) stigma undivided, almost sessile ; 

 pods and scapes pubescent. I/ . H. Native at Melville Island. 



Doubtful Platypetalum. PI. i foot. 



Cult. These little alpine plants will require to be grown in 

 pots filled with a mixture of peat and sand, and treated as other 

 alpine plants. They may be either increased by cuttings, made 

 of the barren shoots, or by seeds. 



Tribe XXI. 



BRACHYCARPE'jE, or DIPLECOLOBEjE (see Sub-Ord. 

 V.) ANGUSTISE'PT IE (angustus, narrow, and septum, a par- 

 tition ; dissepiment narrow.) D. C. syst. 2. p. 698. prod. 1. p. 

 235. Silicle didymous (f. 51. .), or twin, with a very narrow 

 dissepiment, and very ventricose valves, one-seeded cells, and 

 a short style, (f. 51. 6.) Cotyledons biplicate ? 



CIX. BRACHYCARP^E'A (from /3pa X ve, brachys, short, 

 and Kapirog, karpos, a fruit ; alluding to the short pods.) D. C. 

 syst. 2. p. 698. prod. 1. p. 235. 



Character the same as tribe. A little smooth twiggy shrub, 

 with a pod like that of Senebiera or Biscutella, and with the habit 

 of the shrubby species of Heliophila (f. 51.). 



1 B. v ADRIANS (D. C. syst. 2. p. FIG. 51. 



699.) suffruticose, smooth ; pods 

 somewhat twin ; leaves oblong-li- 

 near. Tj . G. Native of the Cape 

 of Good Hope. Coronopus ano- 

 malus, Spreng. syst. 2. p. 853. 

 Deless. icon. sel. 2. t. 200. Flowers 

 large. 



Var. a,jlava (B.C. 1. c.) flowers 

 yellow. Heliophila flava, Lin. fil. 

 suppl. 297. Myagrum grandiflo- 

 rum, herb. Banks. 



Var. /3, purpurascens (B. C. 1. 

 c.) flowers purplish. Polygala brac- 

 teolata, Burm. herb. 



Varying Brachycarpaea. Shrub 

 1 to 1J foot. 



Cult. This curious little shrub 

 will thrive well in a mixture of sand, loam and peat ; and young 

 cuttings will root freely under a hand-glass, if planted in a pot 

 of sand. 



SUB-ORDER VI. SCHIZOPETALIE'^. Cotyledons 4, 

 twisted separately, whorled. Calyx closed. Petals pinnatifid. 

 Filaments nearly equal. Glands 4, linear, erect, nearly opposite 

 the petals. Style very short, crowned by 2 approximate stigmas, 

 which are decurrent at the base. Silique torose, sessile, 2-celled, 

 narrow-linear. Seeds in one row. Radicle white, arched, a little 

 longer than the seed. 



CX. SCHIZOPE'TALON (from <r X 'fr>. schizo, to divide, 

 irtraXov, petalon, a petal ; in allusion to the cut or divided petals.) 

 R. Br. in bot. reg. t. 752. Character the same as the order. 



1 S. WALKE'RI (R. Br. in bot. mag. 2378.) Q. F. Na- 

 tive of Chili. An annual herb, with alternate sinuately-pin- 

 natifid leaves. Flowers white, in long racemes ; pedicels each 

 furnished with a linear bractea. The whole plant is beset with 

 branched down. 



Walker's Schizopetalon. Fl. May, Aug. Clt. 1821. PI. ^ 

 to 2 feet. 



Cult. This singular cruciferous plant should be raised in 

 pots in a green-house in spring, when some of them may be 

 planted out in the borders, others may be saved in the pots, 

 and placed in an airy part of the green-house, where they will 

 produce seeds, although sparingly. A mixture of loam, peat, 

 and sand suits it best. 



