252 ON SEEDLINGS 



Cotyledons oval, submucronate, 1-1 cm. long, 8 mm. wide, 

 sparsely hairy on the nerves, petiolate ; petiole channelled above, 

 dilated and connate at the base, 1 cm. long. 



Stem ultimately developed when about to flower, annual. 



Leaves radical (and ultimately cauline), alternate, exstipulate, 

 petiolate, coarsely hairy especially when young and on the petioles ; 

 petioles channelled above, dilated and subamplexicaul at the base. 



No. 1. Triangular-subcordate, coarsely dentate or lobulate, rather 

 indistinctly nerved above, more prominently beneath. 



No. 2. More elongated and pinnatifid or pinnatisect ; terminal 

 segment very large, nve-lobed ; lateral segments one or two, very 

 small, oval or elliptic. 



No. 3. Pinnatisect with one to two small lateral segments, and 

 a large terminal sub-bipinnatifid one. 



Ultimate leaves lyrate-pinnatisect, pinnatifid ; lateral segments 

 alternate, very irregular in size and division, ovate or oblong, 

 acutely incise-serrate or pinnatifid, frequently exhibiting small 

 intermediate segments cut away from the posterior basal side ; 

 terminal segment much the largest, triangular, trinerved, lobed 

 or pinnatifid, and coarsely incise-serrate, often with small oval, or 

 elliptic, acute, entire segments cut away from its base. 



Romanzoffia sitchensis, Cham. ? 



Primary root tapering downwards and giving off a few lateral 

 rootlets, soon superseded by numerous, strong adventitious roots 

 from the base of the cotyledons and leaves. 



Hypocotyl undeveloped. 



Cotyledons rotund-ovate, obtuse, entire, petiolate, trinerved, 

 with the lateral nerves incurved and uniting with the midrib below 

 the apex, minutely glandular-pubescent on both surfaces, deep 

 opaque green above, paler beneath, tipped with a gland ; lamina 

 3-4-25 mm. long, 2-5-4-25 mm. wide ; petiole flattened above, 

 convex on the back, tapering upwards from a broad, dilated and 

 slightly connate base, minutely glandular-pubescent, reddish-purple, 

 2-5-6 mm. long. 



Stem herbaceous, and developed only when about to flower, 

 about six inches long ; primary internodes undeveloped. 



Leaves radical and cauline, alternate, exstipulate, petiolate, pal- 

 mately nerved and toothed or lobulate, slightly hairy on both sur- 

 faces with pale-coloured jointed hairs, deep opaque green above, 

 paler beneath ; petioles semiterete, slightly flattened above, much 

 dilated and clasping at the base, hairy or almost villous with pale 

 jointed hairs, especially in the hollow dilated bases. 



