S. Candidas, the plant now figured, has pinnatificl leaves, 

 with linear entire rather wavy segments. The flowers are 

 pure white, without a stain of any other colour ; their lower 

 lip has the middle lobe divided into two acuminate flat seg- 

 ments, and the two lateral ones setaceous and shorter. The 

 upper lobe is two-lobed. This was found wild near Coquimbo 

 by Mr. Bridges, whose no. 1356 it is. It is a very pretty 

 half-hardy annual, and well worth cultivation. 



S. Grahami, although figured with large flowers, is really 

 a comparatively small-flowered species. Its leaves are some- 

 thing like those of S. candidus, but they are interruptedly 

 pinnatifid, and more incised. The flowers are lilac, with a 

 yellow upper lip, which is lanceolate acute and undivided ; the 

 lower lip consists of four acuminate incurved lobes, of which 

 the laterals are short. 



Finally, S. retusus, the finest of the genus, has deep rose- 

 coloured flowers, with an orange yellow emarginate oblong 

 upper lip,- and a lower with four flat acute lobes, the lateral 

 of which are shorter than the others. 



The following specific characters state the more important 

 differences amono^ the species. , ,, ,> ^ , ^^ , . 



^ 1. S. pinnatus (Fl. Peruv. 1. t. 17. Bot. Mag. t.2iS4: Hooker's Bofe- 

 SiLf'tt' fu^" ^ise-. t. 73. S. porrigeus, Graham in B^-Misc. t. 86.) ; foliis pinnatis 

 '' laciniis pinnatifidis, corollse labio inferiore trilobo : lobo intermedio 



cucullato bilobo lateralibus falcatis spathulatis obtusis, labio superiore 

 retuso V. emarginato. 



2. S. pinnatifidus ; foliis angustis pinnatifidis : laciniis rotundatis nanis in- 



tegris, corollse labio inferiore trilobo : lobo intermedio cucullato bilobo 



lateralibus falcatis spathulatis obtusis, labio superiore bilobo. Cap- 



sula S. pinnati sed duplo major. 



3. S. Hookeri (Gillies in Bot. Mag. t. 3070) ; foliis interrupte pinnatis foliolis 



lincaribus serratis, corollse labio inferiore 4-lobo laciniis intermediis 

 falcatis setaceo-acuminatis lateralibus setaceisj labio superiore cuspidato- 

 acuminato. Capsula maxima. 



4. S. candidus ; foliis pinnatifidis laciniis linearibus undulatis integris, corollse 



labio inferiore 3-lobo laciniis lateralibus setaceis intermedia biloba acu- 

 tissima, labio superiore alte bilobo. 



5. S. Grahami (Gillies in Bot. Mag. t. 3044) ; foliis interrupte pinnatis 



foliolis linearibus v. oblongis serratis, corollse labio inferiore 4-lobo lobis 



acurainatis incurvis lateralibus abbreviatis, labio superiore lanceolate. 



Capsula minima generis. 



6. S. returns (Hooker Bot. Mag. t. 3045) ; foliis interrupte pinnatis laciniis 



linearibus obtuse serratis, corollse labio inferiore 3-lobo, laciniis lateralibus 

 abbreviatis intermedia acut& biloba, labio superiore oblongo retuso. 



