CXLIX. HYDROLEACE,E. 



561 



Phacelia. Flower-bud (mag.). 



P/tacelia, Diagram. 



fillisia. 



Seed cut vertically 

 (mag.). 



Ellisia,. 



Cylindrical 



embryo 



(mag.). 



alternate, the lower sometimes opposite, exstipulate. FLOWEES $, regular, in 

 spikes or scorpioid racemes, very rarely solitary on axillary peduncles. CALYX 

 5-partite, persistent, aestivation imbricate. COROLLA monopetalous, inserted outside 

 a hypogynous disk, campanulate or sub-rotate, very rarely infundibuliform, tube 

 often furnished with scales within alternate with the stamens, limb 5-fid, sestiva'tion 

 imbricate. STAMENS 5, inserted at the bottom of the corolla-tube, and alternate 

 with its lobes ; filaments with various basal appendages ; anthers introrse, 2-celled, 

 dorsifixed, versatile, dehiscence longitudinal. OVARY 1- or incompletely 2-celled ; 

 placentas 2, linear or dilated, adnate by the base and apex to the ovary, but the 

 dorsal face often free ; style terminal, 2-fid at the top, lobes terminated by a papillose 

 stigma ; ovules 2 or more, attached by tljeir ventral face, semi-anatropous. CAPSULE 

 membranous or almost fleshy, 2-valved, placentas free or on the middle of the valves. 

 SEEDS angular or sub-globose. EMBRYO straight, in a copious cartilaginous albumen, 

 axile or excentric ; radicle distant from the hilum, vague, or rarely superior. 



PEINCIPAL GENERA. 



Hydrophyllum. 

 Phacelia. 



* Nemophila. 

 Cosmanthus. 



Ellisia. 

 ' Whitlavia. 



* Eutoca. 



Hydrophyllece are near Polemoniacea (see this family). They also approach Hydroleacea, which only 

 differ in the anatropous ovules and distinct styles. They were long confounded with Borraginea, but 

 their only resemblance is in the scorpioid inflorescence. 



Hydrophylka: abound in the temperate regions of North America ; they are rare in extra-tropical 

 South America, and still rarer in the tropics. One species only, H. cnnadense, is used in medicine, being 

 considered in America a specific for snake-bites. 



CXLIX. HYDEOLEACE^E, 



(CoNVOLVULORUM genera t Jussieu. HYDROLEACE./E, Br.) 



COROLLA monopetalous , hypogynous, isostemonous, cestivation imbricate. STAMENS 

 inserted on the corolla-tube. OVARY more or less completely 2-celled ; OVULES anatropous ; 

 STYLES 2, distinct. CAPSULE loculicidal or septifragal. EMBRYO albuminous. 



Annual herbaceous or sub- woody PLANTS with watery juice ; stem and branches 



o o 



