34 General Key to the Families 



ORDER XXX. POLEMONIALES 

 LVII. POLEMONIACE^:. POLEMONIUM FAMILY 



Herbs; leaves alternate or opposite, regular; flowers with per- 

 sistent calyx, corolla lobes convolute in the bud, a three-celled 

 ovary, three-lobed style; fruit seeds amphitropous, the coat fre- 

 quently mucilaginous when moistened and emitting spiral threads. 



I. PHLOX. L. 



i. P. Douglasii. Hook. Alpine Phlox. 

 II. GILIA. Rinz and Pav. 



i. G. aggregata. Spreng. Scarlet Gilia. 

 III. POLEMONIUM. (Tourn.) L. 



1. P. confertum. Gray. Blue Greek Valerian. 



2. P. humile. Willd. Purple Greek Valerian. 



LVIII. HYDROPHYLLACE^:. WATERLEAF FAMILY 



Herbs commonly rough-hairy, with colourless insipid juice; 

 leaves mostly alternate, sometimes opposite or basal, round-reni- 

 form or cordate ; flowers regular in spikes, false racemes or scorpi- 

 oid cymes, curled when in bud and uncoiling as they flower ; fruit 

 a two-valved many-seeded capsule, the seeds mostly reticulated or 

 pitted. 



I. PHACELIA. Juss. 



1. P. sericea. (Graham.) Gray. Mountain Phacelia. 



2. P. heterophylla. Pursh. Blue Phacelia. 

 II. ROMANZOFFIA. Cham. 



i. R. sitchensis. Bong. Mist Maidens. 



LIX. BORAGINACE^:. BORAGE FAMILY 



Chiefly mucilaginous herbs with hairy stems; leaves alternate, 

 rarely opposite, entire, without stipules; flowers perfect, symmet- 

 rical, mostly on one side of the branches in a reduced cyme, occa- 

 sionally leafy-bracted, imitating a raceme, rolled up from the tip 

 and straightening out as it flowers; fruit four nutlets, sometimes 

 armed with barbed prickles, or a drupe. 



