Genus i. 



RUSH FAMILY 



13. Juncus interior Wiegand. Inland 

 Rush. Fig. 1 1 78. 



Juncus interior Wiegand, Bull. Torr. Club 27: 516. 

 1900. 



Plants li G -3° high, light green. Leaves basal, 

 several; blades about one-third the length of the 

 plant, about i" wide, sometimes involute; scapes 

 grooved : inflorescence i'-4' long, many-flowered, 

 the branches ascending; flowers scattered, rather 

 distant; perianth straw-colored, ii"-2" long, its 

 parts nearly equal, lanceolate-subulate, slenderly 

 acute or acuminate, appressed or erect, the petals 

 margined to the apex : stamens 6, half as long 

 as the perianth; anthers much shorter than the 

 filaments; capsule oblong or rarely ovoid-oblong, 

 about as long as the perianth, obtuse or barely 

 apiculate: seeds oblong, \"-\" long. 



In dry woods or on prairies, Illinois to North Da- 

 kota, Wyoming, Tennessee, Arkansas, Texas and Ari- 

 zona. 



14. Juncus secundus Beauv. Secund Rush. Fig. 1179. 



Junus secundus Beauv.; Poir. Encycl. Sup. 3: 160. 1813. 

 Juncus tenuis var. secundus Engelm. Trans. St. Louis Acad. 

 2 : 450. 1866. 



Tufted, 6'-i6' high; leaves usually less than one- 

 third the height of the plant; inflorescence longer than 

 its lowest leaf or only slightly exceeded by it, io"-4' 

 high, the flowers secund on the usually somewhat 

 incurved branches; perianth-parts ii"-ij" long, equal- 

 ling or barely exceeding the capsule and appressed to 

 it for about two-thirds their length, often reddish 

 above; stamens 6, about one-half as long as the peri- 

 anth ; capsule narrowly ovoid, 3-sided above the middle 

 with straight sides and a truncate apex, completely 

 3-celled, the placentae meeting in the axis ; seed i"-i" 

 long, narrowly oblong to ovoid,- obliquely tipped, with 

 12-16 longitudinal rows of areolae two or three times 

 broader than long. 



In dry soil, Maine and Vermont to Pennsylvania, North 

 Carolina, Illinois and Missouri. 



15. Juncus Vaseyi Engelm. Vasey's Rush 



Juncus Vaseyi Engelm. Trans. St. Louis Acad. 2 : 448. 1866. 



Stems erect, tufted, i°-2i° high, I" in diameter or 

 less ; basal leaves with minutely auriculate sheaths, 

 the uppermost bearing a terete channeled blade, half to 

 three-fourths as long as the stem; stem-leaves none; 

 inflorescence i§' in height or less, 4-40-flowered, the 

 lowest bract usually not exceeding the inflorescence; 

 perianth ii"-2" long, the parts subulate-lanceolate, with 

 hyaline margins, the inner slightly shorter; stamens 6, 

 about two-thirds as long as the perianth; anthers 

 shorter than the filaments ;' style almost wanting; stig- 

 mas short; capsule slightly exceeding the perianth, 

 narrowly oblong, obtuse or truncate, with a short tip, 

 3-celled; seed long-tailed, with a linear-oblong oblique 

 body about \" long, 20-24-ribbed, the intervening spaces 

 with faint transverse markings. 



New Brunswick to Maine, Ontario, Michigan, Illinois and 

 Iowa. 



Fig. 1 180. 



