248 MINT FAMILY. 



11. CUNILA, DITTANY. (An old Latin name of unknown meaning.) 



C. Mariana, MAKYI.AMI I). Dry hills through the Middle States ; nearlj 

 smooth, 1' high, corymbo-ely much branched, with ovate or heart-haped almost 

 sessile -> Trate leaves (!' long), and pediiuclcd loo-e cymes of purplish flowers, in 

 summer, y. 



12. HEDEOMA. (Formed from a Greek name of a sort of Mint, refers to 

 the sweet scent.) Low and fragrant-scented, growing in dry and open or sterile 

 grounds, with small (lowers in loose axillary clusters, all summer. 



H. pulegioid.es, AMKKICAX I'KXXYKOYAI,, the pungent aromatic scent 

 anil taste being like that of the Knglish Pennyroyal or Mentha Pulegium of Ku. ; 

 verv common, .V - 8' high, hairy, branching, with oblong-ovate petioled leaves, 

 few' (lowered clusters, and bluish corolla searech exceeding the calyx. 



H. hispida, is common from Western Illinois S. \V. ; 2' - 5' high, hairy, 

 with sessile linear entire leave-, and bristly-ciliate calyx. (T) 



13. COLLINSONIA, HORSK-BALM. (Named for Peter Collinson of 

 London, who corresponded with Bart rani and Linmrus.) Rather tall and 

 larn'c-leaved strong-scented plants : fl. summer. ^ 



C. Canadensis, also called RICH-WEED and STOXE-ROOT, the only com- 

 mon species, in rich moist woods; smooth, 2 -3 high, with ovate >errate, 

 (eaves 3' - ('>' long and on lonu' petioles, and pale yellow lemon-scented flowers 

 on slender pedicels in panicled racemes. 



14. HYSSOPUS, IIYSS< >P. (The ancient Greek name of the plant, from 



the Hebrew.) 2/ 



H. officinalis, the only species, cult, in gardens from the Old World, 

 rarelv running wild : smooth tufted simple stems or branches 2 high ; leaves 

 lance-linear and entire ; small clusters of blue flowers crowded in a terminal 

 spike, in summer. 



15. PYCNANTHEMUM, MOUNTAIN' MINT or BASIL. (Name 



from (I reek, means </< ns< [/an; r-r/ns/ii's.) Several species, all aromatic-scented, 



1-.1 high, in open usually gravelly or sandy soil ; flowers with pale corolla 



often purple-dotted, in late summer and autumn. 2/ Only the following 



widely common. 



P. incanum. Leaves petioled. ovate or oblong, remotely toothed, finely 

 fioft-downy above and white-hoary beneath, those next the open flat cymes 

 whitened both sides; bracts and calyx-teeth .-omewhat awn-pointed. 



P. muticurn. Minntelv soft-down v but hardly whitened, rather low, 

 hii-liy-branehed ; leaves mostly lance-ovate and sessile, with rounded or slightly 

 heart-shaped base, minutely sharp-toothed, rather rigid ; flowers in heads or 

 dense clusters ; calvx-teeth and inner bracts rather blunt. 



P. pilOSUin. Only from W. I'enu. \V., is downy with rather long soft 

 hairs; the bvoadNi lanceolate leaves acute at both ends and nearly entire; 

 \\horled head,- at the cud of the branches ; the calyx-teeth and bracts ovate- 

 lanceolate and acute. 



P. aristatum. Only from New Jersey S.. in pine-barrens : minutely soft- 

 pubescent ; leaves lance-oblong or broadly linear, rigid, almost entire; llowers 

 in head-, with tin- narrow and awn-pointed bracts and calyx-teeth as long as the 

 corolla. 



P. lanceolatum. SmOOthish, not hoary, verv leafy, bushy branched; 

 leaves small and clustered, narrow lanceolate or lance-linear, rigid, M-ssile, ob- 

 tuse at base ; (lower- -mall, in numerous globular close heads which are crowded 

 in terminal eor\ nib- ; calyx-teeth and bract.- -hurt, triangular; lips of the 

 corolla verv short. 



P. linifblium. Like the last, less common X. : smoother, with lauee 

 linear leaves, tuid narrower sharp-pointed bracts and calyx-teeth. 





