506 ON SEEDLINGS 



No. 1. Cordate, cuspidate, with two to three small serratures on 

 each side, trinerved at the base with one to two alternate nerves 

 upwards. 



No. 2. Kotund-cordate, cuspidate, serrate with glandular mucro- 

 nate serratures, five-nerved at the base with a few alternate nerves 

 upwards. 



No. 3. Similar, rather more deeply cut. 



Saxifraga Stracheyi, Hook.f. et Thorns, (fig. 327). 



Primary root slender, tapering, with slender lateral rootlets. 

 Hypocotyl terete, pink, 2'25 mm. long. 



Cotyledons oblong-ovate, obtuse, shortly petiolate, coriaceous, 

 glabrous, deep green above, paler beneath ; lamina 3 mm. long, 

 1-75 mm. wide ; petiole '75 mm. long. 



Stem herbaceous, stout, slowly developed. 



Leaves simple, radical and ultimately ele- 

 vated on the short stem, alternate, stipulate, 

 very shortly petiolate (or the petiole reduced to 

 a sheath margined and topped by the stipules), 

 glabrous, ciliate-serrate, coriaceous, obscurely 

 alternately penninerved, deep green and shin 

 ing above, pale and punctate beneath ; petioles 

 very short and almost reduced to the sheaths ; 

 FIG 327. stipules mostly adnate to the sheaths with free 



Saxifraga Stracheyi. _ \ . .. . 

 Nat. size. fimbnated tips. 



No. 1. Ovate-oval, obtuse, entire, not ciliate. 



No. 2. Oval, obtuse, entire, distantly ciliate. 



No. 3. Oval, obtuse, distinctly ciliate, obsoletely serrate at the 

 apex. 



Further stages are developed by many successive gradations in 

 shape and size, till the leaves become obovate, closely ciliate and 

 obtusely serrate along the upper end or half. 



Ultimate leaves very large, obovate, tapering to the base, dentate- 

 serrate, ciliate, with mucronate serratures, distinctly alternately 

 penninerved, thick, coriaceous, deep green above with paler nerves, 

 pale green beneath and more or less punctate, sublucid on both 

 surfaces, 37 cm. long, 16 cm. wide including the sheath ; serratures 

 largest about the middle of the leaf ; petioles almost reduced to 

 the large sheath ; stipules adnate to the petiole nearly throughout, 

 then connate by their contiguous margins in front of the leaf 

 forming a hood, entire at the margin, and glabrous or thinly 

 ciliate. 



