COMPOSITE 147 



Seed conforming to the shape of the fruit, 4-5 mm. long ; testa 

 thin, membranous ; hilum inconspicuous. 



Embryo straight, filling the seed, colourless ; cotyledons linear 

 or linear-oblong, obtuse, entire, closely adpressed, lying the broad 

 way of the seed ; radicle tapering to the base, acute. 



Calendula algarbiensis, Boiss. 



Achene at least trimorphic ; those of the outer whorl linear- 

 oblong, straight or slightly curved, wingless, covered with glandular 

 hairs, 5-5'5 mm. long, surmounted by a beak from 5-7 mm. in 

 length. 



The second whorl consists of curved fruits, often forming a com- 

 plete coil, winged, the wings bent downwards, covered with about 

 three rows of pointed tubercles, and slightly glandular-hairy, 3-5- 

 4 mm. in diameter. 



The third whorl consists of wingless coiled fruits, forming almost 

 a closed curve 2-5-8 mm. in diameter, extremely rugose, without 

 hairs. 



The fourth whorl is similar to the third, but the fruits are much 

 smaller, being about 1 mm. long, and the coil is not closed. 



Ursinia speciosa, DC. (fig. 478). 



Achene cylindrical-clavate, somewhat curved about the middle 

 and narrowed at the base, longitudinally ten-ridged with the ridges 

 in five contiguous pairs, transversely 

 and minutely rugose, brown, sur- 

 rounded at the base with white 

 cottony hairs, and surmounted by a 

 paleaceous pappus consisting of five 

 ovate, obtuse pieces, hyaline or white 

 and penninerved, with a linear- 

 lanceolate, acute, pale brown midrib. 



Seed basal, erect, conforming in 

 outline to that of the achene, pro- 

 longed at the base ; testa membranous, FIG. 478. Ursinia speciosa. 

 pale, much thinner; hilum basal; A, longitudinal section of achene, 



, , . * 2. B, transverse section of 



Chalaza apical. achene, x 5. 



Endosperm absent. 



Embryo slightly curved, owing to the curve of the achene, large 

 and filling the interior of the seed to which it conforms ; cotyledons 

 linear-spathulate, narrow, truncate at the apex or rounded, or incipi- 

 ently emarginate ; radicle tapered to a narrow or subacute point, a 

 little shorter than the cotyledons. 



L 2 



