692 437. Thlaspi. 80. CRUCIFER/E. Vl.ex.thal 
3. -Thlaspi perfoliatum. Thorow treacle-mustard . 
Siliculce reverse heartshape, winged ; style enclosed, very 
short; stem-leaves heartshape, slightly toothed, bald. 
Thlaspi perfoliatum minus, Raii Syn. 305, 6; Park. 837. 
Thiaspi minus Clusii, Ger. em. 268, 7. 
Thlaspi rotundifolium, Ger. em. 266, 1. 
Thlaspi perfoliatum, Lin. S. P. 902. 
Round-leaved mustard. 
Chalky pastures ; annual ; April and May. 
Stem branched, spreading, on poor soils simple ; leaves 
glaucous, blunt ; root-leaves ovate ; corymhus close, small, 
growing to a very long raceme ; petals small, white. 
b. Capsella. Siliculce wingless. 
4. Thlaspi cuneatum. Wedgeshape treacle-mustard. 
Siliculce reverse heartshape, wedgeshape ; root-leaves pin- 
natifid. 
Bursa pastoris, Raii Syn. 306; Ger. em. 276, l. 
Bursa pastoris major vulgaris, Park. 866. 
Thlaspi Bursa pastoris, Lin. S. P. 903. 
Thlaspi cuneatum, Stokes Bot. M. M. 3, 434. 
Nasturtium Bursa pastoris, Roth Germ. 1,281. 
Shepherd's purse. Poor man's spermaceti. Pick-purse. Case-weed. 
Walls and road-sides ; annual; March to October. 
Stem branched; root-leaves pinnatifid; stem-leaves oblong; 
petals white : varies much in size, according to the soil. 
XXI. 438. NASTURTIOLUM. Bobart. Dittander . 
Siliculce elliptic, not nicked ; valves 2, boatshape, wing- 
less; cells 2-seeded ; filaments toothless. 
Nasturtiolum monlanum. Mountain dittander . 
Leaves pinnate, not in the least cut; petals not longer 
than the calyx; siliculce blunt each way; stigma sessile. 
Nasturtium q. Nasturtiolum montanum annuum tenuissime divisnra 
Bobart, Raii Syn. 304, 4. 
Lepidium petraeum, Lin. S. P. 899. 
Lepidiutn Linnsei, Crantz Austr. 1,7. 
Hutchinsia petraea, R. Brown Hort.Kcw. 82. 
Limestone rocks ; biennial ; March and April. 
Stem 2 in. high, branchy; leaves bald; petals white. 
XXII. 439. TEESDALIA. R. Brown. Heath-cress . 
Siliculce nicked; valves boatshape; cells 2-seeded ; fila- 
ments with a small scale at the bottom, on the inner side. 
