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LAWNS: VEGETATIVE KEY TO SEVEN TURF GRASSES
  MG Manual Reference
Ch. 12, pp. 12 - 13

I. Rhizomes present.
A. Stolons present.
1. Leaves at right angle to stalk....................................................Zoysia
2. Leaves not at right angle to stalk..................................Bermuda grass
B. No stolons....................................................................Kentucky Bluegrass
II. No rhizomes.
A. Stolons present.
1. Stem flattened................................................................St. Augustine
2. Stem not flattened...........................................................Buffalo grass
B. No stolons.
1. Leaf blade narrow, dark green..............................................Ryegrass
2. Leaf blade broad, (1/8 to 1/4 inch).......................................Tall fescue

I.A.1 Zoysia: Warm-season grass. Rhizomes present. Stolons vertical, (at right angle to rhizome), supporting the tiller which usually bears more than one stalk. Leaf blade borne at right angles to stalk. Ligule having short dense hairs. Slow to establish. More shade tolerant than bermuda grass; but less so than St. Augustine.
I.A.2 Bermuda grass: Warm-season grass. Rhizomes and stolons create a course matted turf that will sustain heavy traffic. Ligules have long, somewhat sparse hairs. Does not tolerate shade.
I.B.1 Kentucky Bluegrass: Cool-season grass. Rhizomes present, but no stolons. Leaf blade has a prominent midrib and fine obscure veins and a tip shaped like prow of a canoe. Stolons produce a thick, dense turf that supports moderate traffic. Adapted to high elevation areas.
II.A.1 St. Augustine: Warm-season grass. Stolons present, but no rhizomes. Stems flattened. Leaves are wide and dull green with top of the leaf blade facing up. Tolerates shade.
II.A.2 Buffalo grass: Warm-season grass. Stolons present, but no rhizomes. Upper surface of leaf blade light green and very hairy.
II.B.1 Ryegrass: Cool-season grass. No stolons or rhizomes. Leaf blade has pronounced midrib and smaller side veins. Leaf tip is pointed. Long, narrow, dark green leaves with shiny lower surface.
II.B.2 Tall Fescue: Cool-season grass. No stolons or rhizomes. Leaf blade wider than ryegrass, (3/16 to 1/4 inch). Leaf margin has stiff hairs that point toward tip of leaf blade. Hairs on collar of leaf. Heat resistant, but requires 1 1/2 inches of water per week.


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