EREMOLEPIS 247 



of the rhiz. are swollen into tubers, which serve for hibernation and 

 veg. repr. 



The spike is very like the 3 fl. of a Conifer, and has as much right 

 to the title of flower. It is an axis with short internodes, bearing 

 a dense mass of sporophylls. Each is shield-shaped and bears a 

 number of sporangia upon the under side of the head (i.e. towards 

 the stem), arranged like the horses of a 'merry -go-round.' The 

 spores are of one kind only; each has, running round it, two spiral 

 cuticularised bands of membrane, formed from the outer wall and 

 termed elaters. These are hygroscopic, unfolding in damp air. In 

 the rolling up again on drying, the elaters of one spore become 

 entangled with those of others and cause them to adhere together, 

 so that several prothalli may be formed near to one another when 

 they germinate. This is advantageous, for the prothalli are dioec., 

 though so far as we can tell the spores are all alike. The prothallus 

 is fairly large, the 3 being smaller than the ? . 



The stems of E. hyemale L. (Dutch rushes) are used for polishing, 

 the mechanical tissues contain much silica, as do those of most. 



Equitant (vernation), cf. Vernation. 



Eragrostis Host. Gramineae (10). 150 cosmop., mostly subtrop. 



Eranthemum L. (excl. Psenderanthemum Radlkt.). Acanthaceae 

 (iv. A). 25 trop. As. 



Eranthis Salisb. Ranunculaceae (2). 7 N. palaeotemp. E. hyemalis 

 Salisb. (winter aconite, nat. in Brit.) has a thick rhizome or row of 

 tubers, one formed each year. The sol. term. fls. appear in February, 

 before thel.; each has an invol. of three green 1., a 'calyx' of 6 seg- 

 ments, and several honey-1. or petals. 



Brasilia R. Bruniaceae. Nomen. 



Ercilla A. Juss. Fhytolaccaceae. 2 Chili, Peru. E. voiubilis A. 

 luss., climbs by adhesive discs, endogenous just above the axils. 



Erechtites Rafin. Compositae (8). 15 Am., Austr., N.Z. 



Erect (ovule), erect with stalk at base (fl. held erect). 



Eremaea Lindl. Myrtaceae (n. 2). 6 W. Austr. 



Eremaeopsis O. Ktze. = Eremaea Lindl. (Myrt). 



Eremalche Greene (Malvastrum p.p.). Malvaceae (2). 3 W. U.S. 



Eremantbus Less. Compositae (i). 20 Brazil. 



Eremia D. Don. Ericaceae (iv. 2). 30 S. Afr. 



Eremiastrum A. Gray. Compositae (3). 2 Calif., Arizona. 



Eremiopsis N.E. Br. Ericaceae (iv. 2). i S. Afr. 



Eremium (Cl.), a desert formation. 



Eremobium Boiss. (Alalcolmia BH.). Cruciferae (4). 3 N. Afr. 



Eremocarpus Benth. Euphorbiaceae (A. n. i). 2 Pac. N. Am. 



Eremocarya Greene. Boraginaceae (iv. 2). 3 Pac. N. Am. 



Eremocrilaena Baill. Chlaenaceae. i S. Madagascar. 



Eremochloa Buese. Gramineae (2). 6 SE. As. 



Eremochloe S. Wats. Gramineae (ro). 2 W. N.Am. 



Eremocitrus Swingle ( I'ripkasia p.p.) Rutaceae (v). i N. Austr. 



Eremocrinum M. S. Jones. Liliaceae (in), i California. 



Erernogxtfie Fenzl. = Arenaria L. p.p. (Carophyll.). 



Eremolaena Baill., cf. Eremochlaena. 



Eremolepis Griseb. Lonmthaceae (n). 5 trop. A., W.I. 



