182 



CRUCIFER.E. XXXII. PETROCALLIS. XXXIII. DKABA. 



stalked, upper ones linear ; pods flat, short, y. . H. Native 

 about Damascus, on a mountain called Dgebel-cher. Pods 

 ovate-orbicular, compressed, 2-ovulate, 1 -seeded from abortion. 



Narrow-leaved Peltaria. FL May, July. PL 1 foot. 



3 P. GLASTiF6nA (D. C. syst. 2. p. 330.) cauline leaves sa- 

 gittate, stem-clasping ; pods flattish, rather rough, leathery. 1- 

 seeded (f. 46. t.). () ? H. Native of Syria, between Aleppo and 

 Mossul. 



Woad-leaved Peltaria. Fl. Jun. Jul. Clt. 1823. PL 1 foot. 



Cult. The species of this genus will thrive well in any com- 

 mon garden soil ; they are readily increased by seeds. 



XXXII. PETROCA'LLIS (from vtrpov, petron, a rock, and 

 KaXot, kalos, beautiful ; in allusion to the plant growing on the 

 rocks, which it enlivens with the beautiful tufts of rose-coloured 

 blossoms.) R. Br. in hort. kew. ed. 2. vol. 4. p. 93. D. C. syst. 

 2. p. 330. prod. 1. p. 166. 



LIN. SYST. Tetradynamia, Siliculosa. Silicle sessile, oval, 

 with flattish valves. Seeds not margined, 2 in each cell. Funi- 

 cles adhering to the dissepiment. Cotyledons oval, obliquely 

 accumbent. A small ever-green, branched, tufted herb. Leaves 

 cuneated at the base, but cleft at the apex into 3-5 divisions. 

 Racemes short, somewhat corymbose, few-flowered, bractless. 

 Flowers rose-coloured. Plant having the appearance of a spe- 

 cies ofSaxifraga when not in flower. 



1 P. PYRENA'ICA (R. Br. 1. c.) If.. H. Native of the Pyre- 

 nees, Provence, Piedmont, Switzerland, Austria, Transylvania, 

 Carniola, and many other parts of the south of Europe, on 

 rocks, between stones, in places exposed to the sun at the height 

 of 2100 and 4100 feet. Lod. bot. cat. t. 635. Sweet, brit. fl. 

 gard. icon. Draba Pyrenaica, Lin. spec. 896. Jacq. fl. aust. t. 

 228. Curt. bot. mag. t. 713. Flowers elegant rose-coloured. 

 Leaves cuneate, 3 or 5, cleft at top. 



Pyrenean Petrocallis. Fl. May, June. Clt. 1759. PL i foot. 



Cult. This pretty little plant is well adapted for ornamenting 

 rock-work, or it may be grown in little pots, in a mixture of 

 peat, loam, and sand, and placed among other alpine plants. It 

 is easily increased by seeds, or dividing the plant at the root. 



XXXIII. DRA'BA (from Bpafiri, drabe, acrid, biting, ac- 

 cording to Linnaeus ; taste of leaves. It is to be suspected that the 

 name Draba was not originally given to this genus.) D. C. syst. 

 2. p. 331. prod. 1. p. 166. Draba, spec. Lin. Juss. R. Br. 



LIN. SYST. Tetradynamia, Siliculosa. Silicle sessile, oval 

 or oblong (f. 46. j.\ with flat or convex valves (f. 46. j.). Seeds 

 many, not margined (f. 46. j.). Calyx equal at the base. 

 Petals entire. Stamens all toothless. Perennial or annual 

 branched herbs, which are sometimes tvifted, sometimes elongated, 

 smooth or pilose, or usually velvety from soft branched hairs. 

 The leaves are either linear, oblong or ovate, entire or toothed. 

 Racemes terminal ; pedicels filiform, bractless. Flowers yellow 

 or white. 



SECT. I. AIZOPSIS (from att, aei, always, woc, zoos, alive, 

 and o-J/if, opsis, resemblance ; plants always green, like D. Aizoon.} 

 D. C. syst. 2. p. 332. prod. 1. p. 166. Little evergreen, tufted, 

 perennial plants with naked scapes, and ciliated stiff leaves. 

 Flowers yellow, with filiform styles, which vary in length. (A 

 proper genus, according to Andrz. in litt.) 



1 D. AIZOIDES (Lin. mant. 91.) scapes naked, smooth ; leaves 

 lanceolate-linear, keeled, ciliated ; stamens about the length of 

 the petals ; style almost as broad as the pod. i;. H. Native 

 on walls, rocks, and gravelly places of mountains, in France, 

 Germany, Switzerland, North of Italy, Carpathian Mountains, 

 Transylvania, and Britain in South Wales ; near Whormshead, 1 6 

 miles west of Swansea ; about Pennard Castle, near Swansea, 



abundantly, in inaccessible spots. Jacq. fl. aust. t. 132. Smith, 

 eng. bot. t. 1271. Draba alpina, Crantz, aust. 1. p. 13. Aly's- 

 sum" ciliatum, Lam. fl. fr. 2. p. 479. Draba montana, Berg, 

 phyt. univ. icon. Mce'nchia aizoides, Roth. germ. I. p. 273. 



Var. ft, minor (D. C. syst. 2. p. 333.) distinguished by its 

 smaller stature, very short leaves, and smooth pods. Draba 

 ciliaris, D. C. fl. fr. ed. 3. vol. 4. p. 697. 



Var. y, diffusa (D. C. 1. c.) stems elongated, diffuse. Draba 

 ciliaris, Lin. mant. 91. Ger. gallopr. p. 344. t. 13. f, 1. 



Aizoon-like or Sea-Green Whitlow-Grass. FL March, April. 

 Wales. PL 2 or 3 inches. 



2 D. BRACIIYSTE'MON (D. C. syst. 2. p. 334.) scapes naked, 

 smooth ; leaves elongated, linear, keeled, ciliated ; stamens hardly 

 equal in length with the calyx. 1. H. Native of ? 



Draba aizoides, Curt. bot. mag. t. 170. Mill. icon. 1 p. 14. t. 

 20. f. 2. Draba ciliaris, Lin. mant. p. 91 ? 



Short- stamened Whitlow-Grass. Fl. March, April. Clt. ? 

 PL 2 or 3 inches. 



3 D. AIZOON (Wahlenb. fl. carp. p. 193. in a note.) scapes 

 naked, smooth ; leaves linear, acutish, keeled, stiff", ciliated ; style 

 as broad as the hairy pod, but one half shorter. Tf. . H. Native 

 of Bavaria, Austria, Hungary, Transylvania, and Carpathian 

 mountains, particularly on Mount Chocsz ; on rocks on the lower 

 mountains. Draba ciliaris, Schrank. bav. 2. p. 177. Pods the 

 length of pedicels, always hispid with short hairs. 



Aizoon or Evergreen Whitlow-Grass. Fl. April, May. Clt. 

 1819. PL ^ foot. 



4 D. CUSPIDA'TA (Bieb. suppl. 424.) scapes naked, villous ; 

 leaves linear, acutish, keeled, ciliated ; pods lanceolate, hispid, a 

 little longer than the style. I/ . H. Native of Tauria, Apen- 

 nines, Spain, &c. on mountains, on rocks in places exposed to 

 the sun. Draba aizoides, Pall, ined taur. Bieb. fl. taur. 2. p. 

 92. but not of Lin. Draba aspera, Bertol. amcen. ital. p. 92. 

 but not of Adams. D. alpina, Cav. 



Pointed-leaved Whitlow-Grass. Fl. April, May. Clt. 1821. 

 PL i foot. 



5 D. RI'OIDA (Willd. spec. 3. p. 423.) scape naked, smooth, 

 leaves oblong, stiff, blunt, keeled, sparingly ciliated, older ones 

 reflexed ; petals length of calyx ; style not equalling the breadth 

 of the smooth pod. 7/!.H. Native of Iberia, on rocks. Petals 

 roundish, nearly the length of the calyx. 



Rigid-leaved Whitlow-Grass. FL April, May. PL -j foot. 



6 D. BRYOIDES (D. C. syst. 2. p. 335.) scapes naked, smooth ; 

 leaves oblong, small, keeled, sparingly ciliated, much crowded ; 

 petals and stamens twice the length of the calyx ; style hardly 

 equalling the breadth of the smooth pod. If. . H. Native of 

 Caucasus and Iberia, in alpine, rocky situations. Draba rigida, 

 Bieb. fl. taur. 2. p. 93. suppl. 426. Draba csespitosa, Hoffm. 

 hort. mosc. 1808. no. 1225. not of Willd. Petals oblong, twice 

 the length of the calyx. Plant emulating Saxifraga bryoldes. 



Green-Moss-like Whitlow-Grass. Fl. March, May. Clt. 

 1821. PL 2 inches. 



7 D. OLY'MPICA (Sibth. in herb. Banks. D. C. syst. 2. p. 

 336.) scapes naked, velvety ; leaves linear, keeled, much crowd- 

 ed, ciliated ; pods ovate, hoary-villous ; style very short. I/ . H. 

 Native on Mount Olympus. Draba Aizoides, Smith, prod. fl. 

 grsec. 2. p. 4. but not of Lin. Pods ovate, scarcely compressed. 



Olympus Whitlow-Grass. Fl. April, May. PL 2 or 3 inches. 



8 D. BRUNLEFOLIA (Stev. in mem. sc. nat. mosc. 3. p. 268.) 

 scapes naked, pubescent ; leaves linear, somewhat keeled, cili- 

 ated, acute, loosely rosulate ; petals twice the length of the calyx 

 and stamens ; pods oval, pubescent ; style very short. I/ . H. 

 Native of Eastern Caucasus, on Mount Schahdagh. Petals twice 

 the length of the calyx. Plant loosely tufted. 



Brunia-leaved Whitlow-Grass. Fl. Jun. Clt. 1825. PL i ft. 



9 D. ERIC.SFOI.IA (Stev. mem. sc. nat. mosc. 3. p. 208.) scapes 



