82 Spring Flora of Ohio. 



Hyper -i-cum pro-lif -i-cum L. Shrubby St. John's-wort. — Branchlets 

 2-edged; leaves narrowly oblong, 1-2 in. long; shrub 2-6 ft. high; 

 flowers in single or compound clusters; pods 4-6 lines long. 



Hy-per'-i-cum den-si-flo'-rum Ph. St. John's-wort. — Very much 

 branched above, 1-6 ft. high, slender, crow^ded with smaller leaves; 

 flowers smaller, Yz-y-i, in. in diameter, in crowded compound cymes; 

 pods 2-3 lines long; much like the preceding. Very rare. 



Hy-per'-i-cum per-fo-ra'-tum L. St. John's-wort. — Petals and anthers 

 with black dots; stamens in 3 or ') clusters; stems much-branched and 

 corymbed, somewhat 2-edged ; an introduced perennial herb. 



LVII. Order CIS-TA-CE-/E. ROCK-ROSE FAMILY.— Low shrubs or 



herbs; flowers regular, stamens indefinite, distinct and hypogynous, 

 calyx persistent. 



1. Genus HE-LI-AN'-THE-MUM. — Petals o, yellow, crumpled in the 

 bud, fugacious ; flowers of two sorts — the earlier ones with large 

 petals, the later ones smaller. 



He-li-an'-the-mum can-a-den'-se (L.) Mx. Frost-weed. — Stems at first 

 simple, petal-bearing; flowers solitary; leaves lanceolate-oblong. 



LVIII. Order VI-0-LA'-CE-/E. VIOLET FAMILY. — Herbs; corolla 

 irregular, l-.spurred or gibVjous, style club-shaped, flower 5-merous; 

 ovary 1 -celled, 3 parietal placentas. 



Sepals auricled, lower petal spurred Viola. I 



Sepals not auricled, petals nearly equal in length Solea. 2 



1. Genus VI'-O-LA. — Sepals extended into ears at the base; petals 

 somewhat unequal, 1-spttrred at the base; two of the stamens spurred 

 and enclosed by the spur of the corolla. 



A. Stipiilns never leaj-like, the loiuer more or less scarious. 



(b. Steniless, the leaves and scapes from a rootstock or runners.) 

 ((c. Stigma large, naked, not beaked. 



Vi'-o-la pe-da'-ta L. Birdfoot Violet. — Rootstock erect, not scaly; 

 leaves 3 to 5-divided or the earliest only parted, the lateral divisions 

 2 to 3-parted, all linear or narrowly-spatulate ; flower large. 



([c. Stigma small, naked, often beaked or pointed. 

 (((d. Rootstock fleshy and thickened, not filiform; lateral petals bearded.))) 



