DTDYNAMIA. GYMXOSPERMIA. 35 



Species. 1. O vnlgare. Indig-enous. — .\ g'enus of 

 about \7 species almost exclusively indigenous to the Le- 

 vant; of these O. I'otirnefortii'is one of the rarest and most 

 local plants in the world. 



412. DRACOCEPHALUM. L. (Draj^on's head.) 

 CalLv siibrqual, 5 cleft. Orifice of tlic corol- 

 la inflated; ui)per lip concave. Stamiria uncon- 

 itected. 



Herhaceous or rarely siifTruticnsf ; flov/ers verticillately 

 spiked and terminal, or axillary, pedimcles one or many- 

 flowered, bracterjtc; bractes broad, sometimes ciliate, in 

 most of the American species very small. 



Species, 1. D. Tariegainm. 2. Virginia num. 3- denii- 

 ntlatiun. 4. * cordntum. Stolonifiprons; stem and elonga- 

 ted petioles pubescent; leaves cordate, obtusely crenate, 

 upper side a little hii sutc; spike unilateral; pedicells bi- 

 bracteolatr; bractes of the rachis nearly 3S long -^s tl e ca- 

 lix, broad-ovate, entire. Obs. Root creeping-, perennial, 

 fibrous. Stem stoloniferous aftfr flowering", scarcely a 

 Toot hiu;"h, qiiadranf';n!ai', si'bpllose. Lesves about 3 or 4 

 pair, almost as broad as iVno-, obtusely cordate, smooth be- 

 Jieath, petiole the length of the lamina (about an inch,) up- 

 perniost pair of leaves sub.'-essile. Rractes imusually large, 

 pedi.'iicles short and thick, mostly l-flovt'ered. Flowers se- 

 cund. Calix submembranp.ceous, neftrly equal, partly 

 campanulute, segments acute, almost pungent. Corolla 

 pale blue, about an inch long, and larger tlian that of Z>. 

 virginiamivi; orifice much dilate(>; upper lip concave, ob- 

 tuse, and emarginate, lateral teet!) of t!ie lower lip conspi- 

 cuous; central segment rounded, pilose, and elegantly 

 spotted. Heceptacle of the seed large, many of the 

 seeds abortive. Hab. On the shady islands of the Ohio, 

 about 40 miles below Pittsburg]-; flowering in June. The 

 whole plant, but more particularly tie flower, pos?es9es 

 an agreeable balsamic aroma, considerably like that of 

 the Balm of Gilead {D. canariense) but in an inferior de- 

 gree. 



5. * parviflorjim. Flowers verticiilate, snbcapitate; 

 leaves ovate-lanceolate, deeply serrate, and petio- 

 late, bractes foliaceous, ovate, ciliate, and serrate, ser- 

 ratures conspicuously mncronatc; upper segment of the 

 calix much larger than the rest; flower scarct ly longer 

 than the calix. Hab Around Fort Mand:<n, on the Mis- 

 souri; on the borders of thickets. Obs. FViennial; nearly 

 smooth, stem and petiole a little pubescent; flowers al- 



