5. Panicum Capillare L. Witch-Grass. Tumble-Weed

Fig. 315

Panicum capillare L. Sp. PI. 58. 1753.

Culms erect or ascending, 1°-2° tall, simple or sometimes sparingly branched. Sheaths papillose-hispid; blades 6'-1° long, 3"-8" wide, more or less pubescent; terminal panicle generally 8'-14' long, lower branches at first included in the upper sheath, finally exserted and spreading, 6'-10' long; lateral panicles, when present, smaller; spikelets 1"-1 1/4" long, acute; first scale one-fourth to one-half as long as the spikelet; second and third scales nearly equal, exceeding the fourth.

In dry soil, common as a weed in cultivated fields, Nova Scotia to North Dakota, south to Florida and Texas. Also in Bermuda. Old-witch-grass. Tickle-grass. Fool-hay. July-Sept.

5 Panicum Capillare L Witch Grass Tumble Weed 3155 Panicum Capillare L Witch Grass Tumble Weed 316

6. Panicum Barbipulvinatum Nash. Barbed Witch-Grass

Fig. 316

Panicum barbipulvinatum Nash; Rydb. Mem. N. Y. Bot. Gard. 1: 21. 1900.

Annual. Culms 8-18' tall, smooth and glabrous; sheaths papillose-hispid with spreading hairs; blades up to 5' long, 2"-5" wide, lanceolate, hirsute; panicle occupying usually more than 1/2 of the plant, much-exserted, broader than long, its branches widely spreading or the lower ones reflexed, the pulvinus in the axils well-developed and strongly hirsute; spikelets 1 1/2"-1 3/4" long, acuminate, glabrous, the scales acuminate, the first 1/2 as long as the second which is longer than the third, the fruiting scale 2/3 as long as the spikelet.

In dry places, Wisconsin to British Columbia, Nebraska, Texas and California. Aug. and Sept.

7. Panicum Gattingeri Nash. Gattinger's Witch-Grass

Fig. 317

Panicum capillare var. campestre Gattinger, Tenn. Fl. 94.

1887. Not P. campestre Nees. 1826. Panicum capillare Gattingeri Nash, in Britt. & Br. 111. Fl.

1: 123. 1896. Panicum Gattingeri Nash, in Small, Fl. SE. U. S. 92. 1903.

Annual. Culms slender, hispid, finally branched at all of the nodes and the branches again dividing, often prostrate at the base, 1°-2° long, or rarely depauperate and but a few inches high; sheaths papillose-hirsute; blades 6' long or less, 2"-3" wide, pubescent to nearly glabrous, erect; primary panicle 4'-6' long, its branches ascending, the larger ones usually 2'-3' long, the lateral panicles smaller; spikelets about 1" long, elliptic, acute, glabrous.

In poor, often moist soil, Maine to North Carolina, Iowa and Missouri. Aug.-Oct. Illustrated for P. capillare L. in the first edition.

7 Panicum Gattingeri Nash Gattinger s Witch Grass 317

8. Panicum Philadelphicum Bernh. Wood Witch-Grass

Fig. 318

Panicum capillare var. minor Muhl. Gram. 124. 1817. Panicum capillare var. sylvaticum Torr. Fl. 149. 1824..

Not P. sylvaticum Lam. 1797. Panicum diffusum Pursh, Fl. Am. Sept. 1: 68. 1814.

Not Sw. 1788. Panicum minus Nash, Bull. Torr. Club, 22: 421. 1895. Panicum philadelphicum Bernh.; Trin. Gram. Pan. 216.

1826.

Culms erect, or occasionally decumbent, 8'-2° long, slender, often branched at base. Sheaths hirsute; blades 2'-4' long, 1"-3" wide, erect, more or less pubescent; panicle 4'-9' long, its lower branches 3'-4' long, spreading or ascending; spikelets about 3/4" long, elliptic, acute, smooth, borne commonly in pairs at the extremities of the ultimate divergent divisions of the panicle; first scale about one-third as long as the equal acute second and third ones, which barely exceed the fourth.

In dry woods and thickets, New Brunswick to Wisconsin, Georgia, Texas and Oklahoma. Aug.-Sept.

8 Panicum Philadelphicum Bernh Wood Witch Grass 318