80 MINNESOTA BOTANICAL STUDIES. 



The epicotyl is about lo mm. long. -Leaves are alternate. 

 The first leaf is broadly heart-shaped, entire, petiolate, palmately 

 five-veined ; the midvein runs to the apex of the leaf. 



ELiEAGNACE^. 



Elaeagnus umbellata Thunb. 



The seeds of this Japanese shrub require about four weeks to 

 germinate. The seed coat is often carried up above ground. 



The cotyledons are oblong-ovate, sharply auriculate, short- 

 petiolate. The blades are quite thick. When they first emerge 

 from the seed coat they are 7-8 mm. long but are finally 10 

 mm. long and 6 mm. broad. The hypocotyl is rather stout, 

 10-30 mm. long. 



The foliage leaves are ovate, entire, petiolate. The first two 

 are opposite or nearly so, later ones are alternate. The epi- 

 cotyl is short, not usually more than 2 or 3 mm. in length when 

 the first leaves are well developed. It eventually may grow to 

 a length of 4-8 mm. 



The seedlings of this plant resemble very much those of E. 

 angiistifolia niicrocarfa* save that in the latter the petioles of 

 the cotyledons are much longer. 



MYRTACE^. 



Eucalyptus globulus Labill. 



This is the well-known "blue gum " tree of Australia. It 

 is planted extensively in California. The seeds germinate in 

 from one to two weeks. The seed coat is often carried up by the 

 cotyledons. These are doubled over each other. One lobe of 

 each is exposed. 



The hypocotyl is slender, about 30 mm. long. The cotyle- 

 dons, when fully opened, are short-petiolate, 3 mm. long and 

 generally twice as broad, two-lobed, the sinus shallow. When 

 first out of the seed coat the cotyledons are about one-half the 

 size here named. No distinct venation was observed, although 

 Lubbockf states that the\'^ are tri-nerved. 



The epicotyl is about 10 mm. long. The foliage leaves are 

 opposite, lanceolate and entire, those higher on the stem be- 



♦Lubbock, op. cit. 2 : 465. 

 tOp. cit. I : 530. 



