Order 90.— BORR AGE WORTS. 275 



flowers seldom yellow, generally in a coiled (circinate) inflorescence • 

 sepals 5 ; petals 5, united below, almost always regular ; 

 stamens 5 ; ovary deeply 4-lobed, forming in fruit 4 separate, 1 -seeded 

 nuts or nutlets, generally without albumen. 



Analysis of the Genera. 



§ Ovary not 4-l(/bed, but separating when ripe ir to several achenia a 



I Ovary 4-lobed or parted, becoming 4 achenia around the style 2 



2 Corolla irregular, with unequal lobes or a bent tube b 



2 Corolla perfectly regular 3 



3 Achenia or ovary prickly. Corolla throat closed with 5 scales. . . .f 



3 Achenia and ovary not prickly 4 



4 Corolla throat closed by 5 scales c 



4 Corolla throat open, no scales, sometimes 5 ridges d 



a Corolla tube with open throat. Achenia 4. Heliotrope. Twrnw^. Heliotro^pium. 1 



a Corolla tube with constricted throat. Achenia 2. i^a^^e ^e^*o. Heliotroph'ttum. 



b Corolla irregularly 5-lobed. Throat open. Blue. Viper's Bugloss.^cn' wm. 



b Corolla with the slender tube bent, closed. Blue. Bughss. Ltcop'sis. 



•c Corolla wheel-form, anthers exserted. Blue. Barrage. Borra'go. 



c Corolla tubular bell-form. Style exserted. White. Comfrey. Sym'phttum. 



d Cor. tubular, with erect, acute lobes. White. False GromweU. Onosmo'dium. 



d Corolla lobes rounded, spreading, e 



e and imbricated in the bud. White or yellow. Gromivell. 'Lithosvief/mvu. 2 



e and imbricated in the bud. Purple or blue, large. Mertex'sia. 3 



e and convolute in the bud. Blue or white, small. Myoso'tis. 4 



f Corolla salver-form. Ach. prickly on the edge. Burr-seed. Echinosper'mum. 



f Corolla funnel-form. Achenia prickly all over. Hound' s-tongue. Cynoglos'sum. 5 



1. HELIOTROTIUM. Turnsol. Heliotrope. 



Corolla salver-form, lobes shorter than the tube. Anthers sessile. Style 

 short, terminal. Ovary entire, splitting at length into 4 achenia.— Herbs 

 or shrubs. Flowers in one-sided, coiled spikes. 



1 H. Europae'um. Wild H. Herb downy. Leaves oval, obtuse. Spikes single or 



forked. White. S. [oUuse. Blue. W. 



2 H. curassav'icum. Glaucovs H. Herb smooth, glaucous. Lvs. linear-lanceolate, 

 8 H. Peruvia'num. Common H. Shrubby, whitish-downy. Spikes many, clus- 

 tered, to.- p. t 



2. LITHOSPER'MUM. GromweU or Grammell. 



Calyx .5-parted. Corolla funnel-form or salver-form, the limb o-lobe,! 

 throat open, naked or with 5 projections. Stamens included. Achenia 



