PAPAVERACE^E 



123 



a strong midrib, and a yellow or milky-white juice ; petioles when 

 present more or less sheathing at the base. 



No. 1. Spathulate, obtuse, entire, or with a tooth on one or both 

 sides near the apex, petiolate, glabrous, thin, glaucous. 



No. 2. Similar, larger. 



No. 3. Subovate, obtuse, with one obtuse serrature on each side. 



Papaver spicatum, Boiss. et Bal. 



Hypocotyl extremely short or subterranean. 



Cotyledons linear, tapering to the base, 8-4 mm. long, not very 

 persistent. 



Leaves glaucous, petiolate ; petioles channelled above, dilated and 

 sheathing at the base ; juice milky. 



Nos. 1, 2, and sometimes 3. Entire, with an oblong to rotund 

 or ovate-obtuse lamina, and ascending or incurved nerves, glabrous.. 



No. 4. Rotund, obtuse, 

 crenate- serrate, glabrous. 



No. 5. Ovate, obtuse, 

 coarsely and distantly cre- 

 nate-serrate, sparsely pilose 

 on the upper surface ; nerves 

 ascending and incurved. 



No. 6. Ovate-oblong, ob- 

 tuse, coarsely and distantly 

 crenate-serrate, pilose on 

 the upper surface. 



Platystemon californi- 

 cus, Benth. (fig. 146). 



Primary root tapering 

 downwards with numerous 

 lateral rootlets. 



Hypocotyl short, hardly 

 appearing above the soil, 

 stout, obconical. 



Cotyledons linear, acute, 

 entire, sessile, glabrous, 

 green, indistinctly one- 

 veined as in the leaves. 



Stem with primary in- 

 ternodes undeveloped. 



First leaves simple, 

 entire, cauline, alternate, exstipulate, sessile, linear, acute, with 



FIG. 146.- Platystemon calif ornicus. 

 Nat. size. 



