110 spring Flora of Ohio. 



exhaling a heavy odor; flowers racenied, large, white or purplish, 

 or spotted with yellow and purple. 



Mar-tyn'-i-a lou-i si-a'-na Mill. (J/ prohoscidea Glox.i Unicorn-plant. 

 — Leaves heart-shaped, entire or undulate, the up])er alternate. 



LXXXIII. Order A-CAN-THA'-CE/E. ACANTHUS FAMILY. — Leaves 

 opposite; flowers labiate or irregular; stamens 2-4; ovary 2-celled. 



L Genus RU-EL'-LI-A. — Calyx ^-parted; corolla funnel-form with 

 spreading, ample border ; flowers rather large, blue or purple, mostlv 

 in axillary clusters. 



Ru-el'-li-a cil-i-o'-sa Ph. Ruellia. — Hirsute, with soft, whitish hairs; 

 leaves nearly sessile, oval or ovate-oblong, 1-2 in. long; tube of the 

 corolla fully twice the length of the setaceous calyx-lobes. 



The other species iR. strepens L.) nearlj' or quite glabrous; leaves narrowed at 

 base into a petiole; tube of the corolla slightly exceeding the lanceolate or linear 



calyx-lobes ; blooms later July to Sepieniber.) 



LXXXIV. Order PLAN-TA-GIN-A-CE-/E. PLANTAIN FAMILY.— Mostly 



acaulescent; leaves radical, riljV^ed; flowers spicate; corolla scarious; 

 ovary free; style filiform. 



1. Genus PLAN-TA'-GO. — Calyx of 4 persistent sepals, mostly mem- 

 branaceous margins; corolla salver-form or rotate, withering on the 

 pod; stamens exserted; leaves ribbed. 



A. Flo',L'i')-s all f>i'i-fect : corolla not closed oTcr thr fi-m't. 



^b. Bracts shorl ; leanes la)iceohitr or broad, strongly ribbed. 

 , c. Ribs of the broad leaves rising /ro)ii I lie midrib. 



Plan-ta'-go cor-da'-ta Lam. Cordate Plantain. — Tall, glal)rous; leaves 

 cordate or round-ovate, 3-8 in long, long-petioled. 



I'c. Ribs of thr leaf free to the contracted base.]) 



Plan-ta'-go ma'-jor L. Common Plantain. — Leaves ovate, oblong-oval 

 or slightly cordate, often toothed; spike dense, obtuse; capsule ovoid, 

 circumscissile near the middle, 8 to lU-seeded ; seeds reticulated. 



Plan-ta'-go ru-gel'-i-i Dec. Common Plantain. — Differing from the 

 last as follows: spikes long and thin, attenuate at the apex; capsules 

 cylindraceous-oblong, circumscissile much below the middle, 4 to !)- 

 seeded; seeds not reticulated. 



