18 Spring Flora of Ohio. 



3. Genus TSU'-GA. — Leaves scattered, flat, whitened beneath, 

 somewhat 2-ranked; cones pendulous, scales thin, persistent. 



Tsu^-ga can-a-den^-sis (L.) Carr. Hemlock: Hemlock Spruce; Spruce. — 



Leaves petioled, short, linear, obtuse, Yz in. long; cones oval, of few 

 thin scales. 



4. Genus THU'-YA. — Leaves small, closely imbricated, persistent, 

 awl-shaped on some branchlets, on others scale-like, blunt, short and 

 adnate; branchlets very flat; cone small, scales few. 



Thu'-ya oc-ci-den-ta'-lis L. Arbor Vitae. — Leaves appressed, imbri- 

 cated, in four rows on the 2-edged branchlets; scales of the cones 

 pointless. 



5. Genus JU-NIP'-ER-US. — Trees or shrubs with awl-shaped or 

 scale-like leaves; cones fleshy, of 3-6 coalescent scales, when mature 

 berry-like, bluish-black with white bloom. 



Ju-nip'-er-us com-mu'-nis L. Common Juniper. — Shrub or small tree; 

 leaves in whorls of three, linear, subulate, rigid y^-]i in. long. 



Ju-nip'-er-us vir-gin-i-a'-na L. Red Cedar : Savin. — Upright shrub or 

 tall tree; leaves mostly opposite, some scale-shaped, others awl-shaped. 



6. Genus TAX'-US. — Leaves flat, rigid, mucronate; fruit a nut-like 

 seed, nearly enclosed by a red fleshy berr3--like cup. 



Tax'-us mi'-nor (Mx.) Britt. (7". canadensis Willd.) American Yew; 

 Ground Hemlock. — A low irregularly spreading bush; leaves linear, 

 green both sides. 



II. Order A-RA'-CE-/E. ARUM FAMILY. — Plants with acrid juice; 

 leaves simple or compound, veiny; flowers on a spadix subtended by 

 a spathe. 



Flowers perfect, covering the globular spadix Spathyema. 1 



Flowers moncecious or dioecious, only on base of spadix Arisccma. 2 



1. Genus SPATH-Y-E'-MA. [SymplocaypHS.)'-Y\&-a\.s with skunk- 

 like odor, leaves very large, broad, entire, veiny, preceded in early 

 spring by the nearly sessile spathe. B. L U 



Spath-y-e'-ma foeMI-da (L.) Raf {Symplocarpus fcvtidus Salisb.)-^-^^' 

 Spathe purple spotted and striped, incurved at the apex. 



