Dicotyls or Exogenous Plants. 101 



The 1 nutlets iiuarnied. mostly smootli aud shining a . 



The I nutlets armed with barbed prickles Cynoglossum. 1 



a. Corolla trumpet-shaped with open throat, usually blue Mcrlensia. 3 



a. Corolla short salver-form, mostly blue, the throat crested Myosotis. '\ 



a. Corolla salver-form to funnel-form, mostly yellow, naked or lo\v 



crested Litliospt'r»iii>ii. \ 



1. Genus CYN-O-GLOS'-SUM. — Corolla funncl-fonn, the throat 

 closed with 5 obtuse scales; nutlets oblique, covered with barbed or 

 hooked prickles. 



Cyn-o-glos -sum of-fic-i-na'-le L. Hound's -tongue. — Clothed with 

 short, soft hairs, leafy ; corolla reddish-purple. 



Cyn o-glos'-sum vir gin'-i-cum I,. Wild Comfrey. — Roughish with 

 spreading bristly hairs; stem 2-o ft. high, few-leaved; stem leaves 

 clasping by a cordate ba.se; corolla pale-blue. 



1. Genus MER-TEN'-SI-A. — Corolla trumpet-shaped, longer than 

 the calyx, naked or with small appendages in the throat ; nutlets 

 fleshy; leaves pale, entire; flowers purplish-blue, rarely white. 



Mer-ten'-si-a vir-gin'-i-ca (I,.) DC. Lung-wort; Blue Bells; Virginia 



Cowslip. — Corolla 1 in. long, the limb spreading, nearh- entire; leaves 

 obovate. 



3. Genus MY-O-SO'-TIS. - Corolla salver-form, the tube about the 

 length of the 5-toothed or 5-cleft calyx ; the throat with o small and 

 blunt arching appendages. 



A. Caly.v npt-ii hi finit. its liairs appressfd. i/oiw hooked of glandular. 



My-o-so'-tis pa-lus'-tris (L.) Relh. Forget-me-not. — Stems ascending, 

 smoothish; leaves rough-pubescent; calyx-lobes n;uch shorter tLan 

 its tube: limb of corolla 3 or 4 lines broad, sky-blue with a yellow e3'e. 



My-o-so'-tis lax'-a Lehm. Forget-me-not.— Stems very slender, de- 

 cumbent, pubescence all appressed ; calyx-lobes as long as its tube; 

 limb of corolla 2 or 3 lines broad, paler blue. 



A. Calyji: closing or the lobes erect in fruit, clothed with spreading hairs, 

 some minutely hooked or gland-tipped, corolla small. 



My-o-so'-tfs ar-ven'-sis Hofi"m. Forget-me-not.— Hirsute with spread- 

 ing hairs ; leaves oblong-lanceolate, acutish ; racemes naked at the 

 ba.se and stalked; corolla blue, rarely white ; pedicels spreading in 

 fruit and longer than the o-cleft, equal calyx. 



