BORAGINE^E 257 



oblong-oval and opposite. The seedling of Eritrichium bar- 

 bigerum is altogether smaller, with spathulate hairy cotyledons 

 showing only a somewhat obscure midrib. 



Suborbicular cotyledons occur in a number of species 

 including Tournefortia ferruginea (fig. 536). They are sub- 

 truncate at the base, trinerved, finely pubescent with rather 

 slender petioles. Those of Omphalodes linifolia are smaller, 

 glabrous, glaucous and one -nerved. In the case of Echium 

 Decaisnei they are small, rotund, and concave. The leaves 

 are all lanceolate or oblong-lanceolate, finely and densely 

 hairy on both surfaces, and appear to vary only in size 

 from the seedling onward to the adult state. 



A most remarkable type is met with amongst the species 

 of Amsinckia in which the cotyledons are bifid or bipartite. 

 In A. intermedia (fig. 537) they are cut down to the petioles, 

 with spathulate, hairy, one-nerved, entire, somewhat stalked 

 and divaricate lobes. Two or more of the primary leaves are 

 linear and hairy. 



Cordia subopposita, DC. 



Fruit a nut, or drupe according to some authors, oblong-ellipsoid, 

 tipped with the remains of the terminal style, glabrous, dark- 

 coloured, four- rarely three- or five-celled, or by abortion reduced 

 to one or more fertile or seed-bearing cells, while the others are 

 empty ; exocarp in the dried state forming a layer of dry, softish, 

 cellular material ; endocarp bony, ellipsoid, subtetragonal, taper- 

 ing above and below the middle, with four slightly excavated or 

 sculptured sides above the middle, slightly notched at the base and 

 shortly bifid at the apex, pale brown or straw-coloured. 



Seed obovoid, somewhat compressed laterally, and subconical at 

 the tip ; testa thin, membranous, smooth, white, micropyle at the 

 upper and pointed end of the seed ; hilum lateral and attached to 

 the inner angle of the cell. 



Endosperm absent. 



Embryo straight, large, filling the entire cavity of the seed, 

 colourless ; cotyledons very broad, rounded, crenate, much plaited 

 from the testa towards the centre of the seed so as to occupy the 

 whole of the space, thick and subfleshy ; radicle short, stout, tur- 

 binate, obtuse, lying in the conical tip of the seed, and pointing 

 to the base of the style. 



IT. S 



