102 Spring Flora of Ohio. 



My-o-so'-tis ver'-na Null. Forget-me-not. — Bristly-hirsute; leaves 

 obtuse, linear-oblong, Or the lower spatulate-oblong; racemes leafy at 

 the base; corolla very small, white; pedicels in fruit erect, rather 

 shorter than the deeply o-cleft, unequal, very hispid calyx. 



4. Genus LITH-O-SPER'-IWUM.— Corolla funuel-form or sometimes 

 salver-shaped, the open throat naked or with a more or less evident 

 transverse fold or scale-like appendage opposite each spreading lobe. 



A. Autlets 7-ough, gray and dull : throat of thr twarty ii'hiti' corolla destitute 

 of any evident folds or appendages. 



Lith-o-sper'-mum ar-ven'-se L. Corn Gromwell. — Stems erect, ()-12 in. 

 high ; leaves lanceolate or linear ; corolla scarcely longer than the 

 calyx. 



A. .\iitlets sinoolh and shining, white : corolla greenish-ichite or pale yellow, 

 small, with 'i distinct pubescent scales in the throat. 



Lith-o-sper'-mum of-fic-i-na'-le L. Common Gromwell. — Leaves thin- 

 nish, broadly lanceolate, acute ; corolla exceeding the calyx. 



Lith-o-sper'-mum lat-i-fo'-li-um Mx. Puccoon. — Leaves ovate and 

 ovate-lanceolate, mostly taper - pointed ; the root-leaves large and 

 rounded; corolla shorter than the calyx. 



A. yutlets white, smooth and sliining ; corolla large, salver-form or nearly 

 so, deep orange-yello'w, the tube much exceeding the calyx and the 

 th I oa t appendaged. 



b. Corolla-tube one-half to lit'ice longer than the calr.r. 



Lith-o-sper'-mum gmel-i'-na (Mx.) Hitch. {L. hirtniii Lehni.) Puc- 

 coon. — Hispid with bristly hairs; corolla woolly-bearded at the base 

 inside; flowers distinctly peduncled; fruiting calyx '/< in. long. 



Lith-0-sper -mum ca-nes'-cens (Mx.) Lehm. Puccoon. — Softly hairy 

 and more or less hoary; flowers sessile, corolla naked at the base 

 within ; fruiting calyx % in. long. 



(b. Corolla lube •J-4 times the length of the caly.r, its lobes erose-toolhed ; 

 but the later Jtoicers small and cleistogamons.. 



Lith-o-sper'-mum an-gus-ti-fo'-li-um Mx. Puccoon. — Minutely rough- 

 strigose and hoary; leaves linear; the early flowers large and showy, 

 the corolla-tube S-18 lines long, the later (on more diff"usely branch- 

 ing plants) with small and pale corollas. 



