IBERIS.] CRUCIFER^. 39 



short horizontal pedicels, in short racemes ; notch triangular ; valves nar- 

 rowly winged, wings acute above ; style exceeding the wings. DiSTRiB. W. 

 Europe, from Belgium southwards. Very bitter. 



20. TEESDALIA, Br. 



Small, annual, glabrous, scapigerous herbs. Leaves rosulate, pinnatind. 

 Flowers minute, white. Sepals spreading, equal at the base. Petals equal, 

 or 2 outer larger. Stamens 4 or 6, with a scale at the base of each filament. 

 Pod broadly obovate or orbicular, emarginate or 2-lobed; valves boat-shaped, 

 slightly winged ; cells 2-seeded ; stigma simple. Cotyledons accumbent. 

 DISTRIB. S. and "W. Europe and W. Asia ; species 2. ETYM. Robert 

 Teesdale, a Yorkshire botanist. 



1. T. nudicau'lis, Br. ; two outer petals twice as long as the others. 

 Sandy and gravelly places, not rare in England, ascending to near 1,000 ft. in 



Yorkshire, very local in Scotland, Moray, Aberdeen, Glasgow ; absent from 



Ireland ; fl. April-June. Stems 4-18 in., usually many, slender, ascending. 



Radical leaves 1-2 in. , numerous, lobes broad, spreading. Flowers -fa in. 



diam. Pods j> in., in racemes 2-9 in., pedicels short slender spreading ; style 



very short. DISTRIB. Europe, N. Africa, W. Asia. 



21. HUTCHIN'SIA, Br. 



A small annual herb. Leaves rosulate, pinnatind. Flowers minute, 

 corymbose. Sepals short, equal at the base. Petals small, equal. Fila- 

 ments without scales at the base. Pod broadly oblong, obtuse, much 

 compressed ; valves keeled ; septum narrow ; stigma sessile. Seeds 2 in 

 each cell, compressed, not margined ; funicle slender ; cotyledons accum- 

 bent. DISTRIB. Europe, N. Africa, W. Asia to N.W. India. ETYM. Miss 

 Hutchius, a zealous Irish botanist. 



1. H. petrse'a, Br. ; sepals about equalling the petals. 

 Limestone rocks W. of England and Wales, from Yorkshire (ascending to 

 to 1,500 ft.) to Somerset ; naturalized on the walls of Eltham churchyard, 

 (where it was planted by Dillenius ?) and of the Mathew cemetery, Cork ; 

 ti. March-May. Glabrous or sparingly hairy, slender, much branched 

 from the base, 2-5 in. Radical leaves ^-1 in., lobes spreading, obovate, 

 almost petioled; cauline shorter, pinnatifid. Pods ^-^ in., on horizontal 

 pedicels, in a short raceme ; style distinct ; seeds pale. 



21*. ISA'TIS, L. WOAD. 



Tall, erect, annual or biennial branched herbs. Cauline leaves sagittate. 

 Flowers yellow, on slender pedicels deflexed in fruit. Sepals equal at the 

 base. Petals equal. Pod indehiscent, 1 -celled, oblong ovate or orbicular, 

 thickened in the middle ; wing or margin very broad ; stigma sessile. 

 Seed pendulous from the top of the cell ; cotyledons incumbent. DISTRIB. 

 Temp. Europe, Asia, and N. Africa ; species 25-30. ETYM. The Greek 

 name of the genus. 



1. I. TINCTO'RIA, L. ; pod obovate-oblong, wing broad and thick. 

 Sporadic ; cultivated fields and chalk-pits ; naturalized near Guildford ; an 



alien, Walton ; fl. July- Aug. Glaucous, glabrous or nearly so. Stem 1-3 ft., 



stout, erect, branched above. Radical leaves oblong-obovate or lanceolate ; 



