312 ON SEEDLINGS 



petiolate and allowing the plumule to pass out between them on 

 one side. 



Stem herbaceous, perennial, succulent, flexuose, ultimately 

 climbing or scrambling amongst other vegetation, glabrous, terete, 

 pale green ; first internode very variable in length according to the 

 depth the seed is buried in the soil ; second undeveloped, bringing 

 two leaves opposite. 



Leaves simple, cauline, alternate (first two opposite), exstipulate 

 (first two stipulate), petiolate, peltate, radiately-nerved, lobulate, 

 deep green above, with a narrow, red or yellow margin, pubescent 

 on the nerves, ultimately glabrous, glaucous beneath, glabrous, and 

 densely covered with sessile glands ; petioles succulent, terete, gla- 

 brous, shining, tapering from a very stout base to the thinnest part 

 immediately at the insertion of the blade ; stipules of the first two 

 leaves small, subulate, coloured like the stem, 1-5 mm. long. 



Nos. 1 and 2. Opposite, peltate, with eight radiating nerves, 

 shallowly trilobulate ; lobes rounded, entire or minutely emar- 

 ginate. 



No. 8. Peltate, eight-nerved, seven-lobulate, with the eighth 

 nerve running into the sinus at the base of the leaf ; lobes shallow, 

 rounded, emarginate. 



Nos. 4 and 5. Similar to No. 3. 



Ultimate leaves peltate, seven-nerved and lobulate, with two 

 short nerves running into the broad shallow basal sinus ; lobes 

 broad, shallow, emarginate. 



Tropaeolum aduncum, Sm. 



Primary root long, fleshy, colourless, with few lateral rootlets. 



Hypocotyl and cotyledons as in T. majus. 



Stem erect, otherwise as in T. majus ; 1st internode in the 

 specimen examined 4*6 cm. long, but variable according to con- 

 ditions and capable of elongating considerably if the seed is deeply 

 buried in the soil ; 2nd internode varying from l-3'5 mm. or 

 more. 



Leaves palmately or subpedately nerved and lobed, reticulate, 

 glabrous, light green above, paler beneath ; petiole terete, tapering 

 upwards from a stout base, glabrous, pale green. 



Nos. 1 and 2. Tripartite, with the lateral lobes again deeply 

 bifid ; middle segment oblong-oval, obtuse, entire ; ultimate lateral 

 lobes oblong, obtuse, entire. 



No. 3. Tripartite ; middle segment cuneate, trifid, with obtuse 

 lobes ; lateral segments again bifid with the anterior lobe more or 

 less toothed, teeth obtuse. 



