406 ON SEEDLINGS 



both sides, somewhat persistent ; petiole glabrous, 1-5 mm. thick, 

 channelled, purplish-red. 



Stem very short, ultimately elongated and woody. 



Leaves digitate, radical and cauline, alternate, stipulate, petiolate, 

 pubescent, with a distinct midrib and other inconspicuous venation ; 

 petiole semiterete, channelled above, sheathing at the base by its 

 adnate stipules, which have a subulate, free point. 



Nos. 1-3. With reddish, pubescent petiole, 2, 4, or more cm. long, 

 1-2 mm. thick, and sheathing at base, with a digitate lamina com- 

 posed of four, six, or more obovate-lanceolate, acute, pubescent, 

 deep green leaflets, -5-1*5 cm. or more long, by 3-5 or more mm. 

 broad. 



Lupinus micranthus, Douglas. 



Primary root similar to that of L. arboreus. 



Hypocotyl erect, terete, very short, glabrous, 4-5 mm. long. 



Cotyledons very similar to those of L. arboreus, with a flexuose 

 midrib and alternate, flexuose, and anastomosing lateral veins, all 

 sunk in the tissue, deep opaque green above, paler beneath ; lamina 

 9-11 mm. long, 6-7 mm. broad ; petiole semiterete, channelled above , 

 dilated and perfoliate at the base. 



Stem annual, developed when about to flower. 



Leaves glabrous above or nearly so, ciliate at the margin, silky 

 beneath, thick and subfleshy ; petiole terete, slightly flattened on 

 the upper side, dilated and amplexicaul at the base, slightly hairy ; 

 stipules, in the seedling at least, adnate to the petiole for two-thirds 

 their length, with narrowly subulate, obtuse, or subacute free points 

 and hairy where free. 



No. 1. Digitate, with three linear, obtuse leaflets, involute at 

 the sides so as to be deeply channelled, as are all the others, at any 

 rate up to the seventh. 



Nos. 2 and 3. With four linear, cuspidate leaflets. 



No. 4. With five acute or aristate leaflets. 



No. 5. With six acute leaflets. 



Nos. 6 and 7. Similar. 



Lupinus sulphureus, Douglas (fig. 265). 



Hypocotyl erect, terete, glabrous, 2-2-5 cm. long, light green. 



Cotyledons suborbicular, thick, fleshy, connate at the base, 

 slightly denticulate, glabrous, dark green, very indistinctly tri- 

 nerved. 



Stem with primary internodes undeveloped. 



