250 ON SEEDLINGS 



Endosperm as in N. maculata, but almost colourless. 

 Embryo as in N. maculata. 



Seedling. 



Primary root tapering downwards and giving off strong lateral 

 rootlets, annual. 



Hypocotyl very short, erect, terete, slightly hairy or scaberulous, 

 4-6 mm. long, and tapering indistinguishably into the radicle. 



Cotyledons more or less orbicular, petiolate, entire and tipped 

 with a glandular mucro, or appearing sometimes slightly emarginate, 

 rigid, subfleshy, usually concave owing to the centre growing faster 

 than the margins, scabrido-pubescent on both sides, with an in- 

 distinct midrib but no other venation, deep green above, paler 

 beneath or violet ; lamina 6'5-9 mm. long, 5'5-8'5 mm. wide ; 

 petiole semiterete, flattened above, scabrido-pubescent, horizontal, 

 dilated and connate at the base, 4-6 mm. long. 



Stem diffuse, annual, with the primary internodes undeveloped. 



Leaves simple, radical and cauline, alternate, or lower opposite, 

 exstipulate, petiolate, lobed, pinnatifid and pinnatisect, with alter- 

 nate ascending nerves running into each of the principal segments 

 and lobes, scabrido-pubescent all over, more or less concave or in- 

 curved at the margin or flat when young, deep green above, paler 

 beneath ; petioles semiterete, flattened above or shallowly grooved, 

 dilated at the base and amplexicaul. 



First pair pinnatifid, with one obovate, lateral lobe on each side, 

 and a terminal broadly cuneate trifid one. 



Second pair pinnatifid, with a pair of broadly cuneate, slightly 

 dentate lateral lobes, and a broadly cuneate or transversely rhom- 

 boid, deeply trifid and slightly toothed terminal segment. 



Third and fourth pairs pinnatisect at the base, and pinnatifid 

 upwards, with the segments mostly trifid. 



Phacelia tanacetifolia, Benth. 



Ovary few-ovuled ; ovules erect, anatropous ; micropyle inferior. 



Fruit a capsule, two-celled, two- to three-seeded. 



Seed oblong, 1-1-5 mm. long, considerally flattened laterally ; 

 testa rugose, membranous ; hilum inconspicuous. 



Endosperm copious, fleshy, almost colourless. 



Embryo straight, embedded in the endosperm, either at or very 

 near the centre of the seed ; cotyledons linear, obtuse, entire, almost 

 flat, closely adpressed, lying either in the broader way of the seed, 

 or obliquely to it ; radicle long, terete, obtuse, narrow, shorter than 

 the cotyledons. 



