280 SPECIMEN OF A FLORA OF CANADA. 
tetramerous flowers with valvate zestivation, and fruit of two or more 
coherent single-seeded carpels, with the calyx adherent. Referring 
Nyssa (which, however, is not a Canadian genus) to Alangiacese 
among the Myrtales, Cornus is our only genus, of which we have 
seven species out of 20 which are known. 
§ 1.—Flowers greenish, collected in a head or close cluster, which 
is surrounded by a large showy 4-leaved corolla-like white involucre. 
Fruit bright red. 
1. CanapeEnsts, L.—Dwarf Laurel : Bunch-berry.—Stems low and 
simple (5’—7’ high), from a slender, creeping, and subterranean rather 
woody trunk. Leaves scarcely petioled; the lower scale-like, the 
upper crowded into an apparent whorl in sixes or fours, ovate or oval- 
pointed; involucral leaves ovate; fruit globular. Woods: common 
in Canada—Toronto, Montreal. June. 
2. C. Fiorina, L.—Flowering Dogwood.—Leaves ovate, pointed, 
somewhat acute at the base ; involueval leaves inversely heart-shaped 
or notched (13’ long); fruit oval; a tree 12°—30° high. Western 
Canada, rare; Hamilton. May and June. 
§ 2.—Flowers white, in open and flat spreading cymes: involucre 
none: fruit spherical. 
* Leaves all opposite. 
3. C. Crrcrnata, L’ Her.—Branches, greenish warty-dotted ; leaves 
round-oval, abruptly pointed, woolly underneath (4’—5’ broad) < 
cymes flat: fruit light blue. Shrub 6°—10° high. Copses: not 
uncommon—Toronto, Hamilton, Montreal. June. 
4. C. Sericea, L.—Branches purplish: the branchlets, stalks, and 
under surface of the narrowly ovate or elliptical pointed leaves, silky- 
downy (often rusty), pale and dull: cymes flat, close: calyx-teeth 
lanceolate: fruit pale blue: flowers yellowish-white. Wet places, 
common—Toronto, Montreal. June. 
5. C. Stotonirera, Michx.—Red Osier.—Branches, especially 
the osier-like annual shoots, bright red-purple, smooth: leaves ovate, 
rounded at the base, abruptly short-pointed, roughish, with a minute 
close pubescence on both sides, whitish underneath : cymes small and 
flat, rather few-flowered, nearly smooth: fruit white or lead-colour. 
