56 CRUCIFER^ 



small, inversely heart-shaped ; style very short. — Waste places on 

 a limestone soil in Gloucestershire, Wilts hire, Oxfordshire, Bucking- 

 hamshire, and Middlesex ; but very rare. — Fl. April, May. 

 Annual. 



3. T. alpestre (Alpine Penny Cress). — Another small species, 

 but little branched ; ste?n-kaves arrow-shaped at the base ; flowers 

 and pods rather larger than in T. perfolidtum ; style longer than 

 the notch of the pod. — Mountainous limestone pastures in the 

 north of England ; rare. — Fl. June — August. Perennial. 



4. T, virens, a closely-allied species, occurs on rocks at 

 Matlock. 



25. Ii^ERis (Candytuft). — Small branched glabrous herbs; 

 floivers corymbose, white or red, rendered conspicuous by their 



corymbose arrangement and by the two 

 outer petals in each flower being much 

 enlarged ; pod ovate, notched ; valves 

 boat-shaped, winged ; seeds 2. (Name 

 from Iberia (Spain), where many species 

 grow.) 



I. /. amdra (Bitter Candytuft). — Stem 

 6—10 in. high; leaves sessile, oblong- 

 lanceolate ; racemes lengthening after 

 flowering ; flowers white or red ; pods 

 small ; 7£'/>?^i' pointed above ; style longer 

 than the wings. — Chalky fields in the 

 south and east of England. — Fi. July. 

 U^akedstaikeTrl'^eSaka) ^nnual. Commonly grown in gardens. 



26. Teesdalea. — Small, annual, glabrous herbs ; leaves all 

 radical, }^\nx\dX\'i\di ) floivers minute, white, on a corymbose scape; 

 petals generally unequal ; pod roundish, notched, keeled ; seeds 4. 

 (Named after Robert Teesdale, a Yorkshire botanist.) 



I. T. nudicaulis (Naked-stalked Teesdalea). — The only British 

 species, a minute and not inelegant plant with leaves closely 

 pressed to the ground and several slender leafless scapes^ 2 — 4 in. 

 high; two ouiex petals twice as long as the others. — Dry banks; 

 not common. Fl. April— June. Annual. 



27. HuTCHiNSiA. — A small, annual, much-branched herb, with 

 pinnatifid leaves ; floivers minute, white, in racemes, which lengthen 

 after flowering ; petals equal ; pod minute, compressed, keeled ; 

 seeds 4. (Named after Miss Hutchins, an Irish botanist.) 



I. H. petrcea (Rock Hutchinsia). — The only British species, a 



