168 PROCEEDINGS OF THE AMERICAN ACADEMY 



JuNCUS TENUIS, Willd. At San Miguelito (555 Schaffner) ; 894 

 Parry & Palmer. 



JuNcus BUFONius, Linn. At San Luis Potosi (556 Schaffner) ; 

 896 Parry & Palmer. 



JuNCUs NODOSUS, Linn. At San Luis Potosi (551 Schaffner). 



TRADESCANTIA, Linn. Umbel-like cyme subtended by leaf-like or small 

 and scarious bracts. Perfect stamens 6 (or 5). Cells of the capsule 2-seeded. 

 » Umbel terminal, sessile, subtended by two leaf-like bracts : leaves lanceolate. 



1. T. MiCRANTHA, Torr. Low and rooting, slender, subpubescent : leaves an 

 inch long or less: flowers small (2 lines long): filaments all hairy. — South- 

 western Texas. 



2. T. LEiANDRA, Tom Stout, rooting at base, a foot high : leaves 2 or 3 

 inches long, somewhat viUous or nearly glabrous : sepals more or less villous, 

 3 or 4 lines long: filaments all naked. — Western Texas and Mexico. 



* * Umbels terminal or sometimes lateral, sessile, subtended by one or two 



leaf-like bracts : leaves linear to narrowly lanceolate. 



3. T. ViRGiNicA, Linn. Very variable : roots fleshy -fibrous : bracts usually 

 a pair : the typical form smooth or only slightly villous, more or less glaucous, 

 often tall and slender and with linear leaves, rather rarely with one or two long 

 lateral peduncles. From the Upper Missouri and Lake Winnipeg to New York 

 and soutliward, and from Texas to Southern Utah and Arizona. — Var. villosa. 

 Similar, but often dwarf, more or less villous throughout, as well as pubescent. 

 In the Mississippi Valley and Gulf States. (Var. Drummondii, Clarke, is a 

 dwarf densely pubescent form of this, not at all villous, collected by Drummond 

 in Texas.) — Var. flexuosa. {T.Jlexnosa,'R3S.) Stout and dark green, with 

 large linear-lanceolate pubescent leaves, the stem usually flexuous, and with 

 several sliort lateral branches or sessile axillary heads. From Ohio to Ken- 

 tucky and Georgia. The extreme forms appear very distinct, but an examina- 

 tion of cultivated and numerous herbarium specimens fails to show satisfactory 

 reliable characters upon which to separate them. T. pilosa, Lehm., is interme- 

 diate between the last and the preceding forms. 



4. T. TDBEROSA, Greene. Very slender, from tuberous roots, glandular- 

 pubescent : leaves very narrowly linear : bracts solitary : flowers smaller 

 (sepals 2 or 3 lines long). — New Mexico and Arizona. 



* * * Umbel pedunculate, subtended by small subscarious bracts : flowers 



small. 



5. T. ROSEA, Vent. Erect from a running rootstock; leaves very narrowly 

 linear. — Maryland to Florida. 



6. T. Floridana, Watson. Prostrate and rooting : leaves oblong-ovate. — 

 Florida. 



TINANTIA, Scheidw. Cyme prolonged and scorpioid, pedunculate. Other- 

 wise as Tradescaniia. 



1. T. ANOMALA, Clarke. ( Efheosanthes ciliata, Raf. Tradescantia anomala, 

 Torr.) Tall, glabrous : leaves cordate-ovate to cordate-lanceolate, the upper 

 sessile : inflorescence shorter than the upper leaf; flowers few ; sepals 6 lines 

 long. — Louisiana and Texas. 



