WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 131 
Lower bracts not appearing as a continuation of the stems, or 
if so channeled on the upper surface; inflorescence ter- 
minal. 
Leaves septate, sometimes equitant, the septa sometimes 
poorly developed and hard to see in dried material. 
Leaves terete, not equitant. 
Capsules narrowly lanceolate; inflorescence with 
short branches; flowers echinate-spreading, or 
the lowest of the head reflexed. 
Heads 7 to 8 mm. in diameter; leaf blades erect; 
petals usually longer than the sepals.... 4. J. nodosus, 
Heads more than 10 mm, in diameter; leaf blades 
usually spreading; petals shorter than the 
sepals. ........-.-- 22. ee eee eee ee eee eee 5. J. torreyi. 
Capsules oblong; inflorescence with elongated 
branches (in J. mertensianus a single head); 
flowers erect or ascending. 
Heads several; leaves terete; seeds not caudate.. 6. J. badius. 
Heads solitary or rarely 2 or 3; leaves somewhat 
flattened; seeds mostly caudate........-. 7. J. mertensianus. 
Leaves equitant, laterally flattened, with one edge 
toward the stem. 
Flower clusters numerous, small, 5 to 12-flowered, 
generally light-colored .............-.----.-- 8. J. brunnescens. 
Flower clusters few, larger, 15 to 25-flowered, 
usually dark-colored. 
Perianth segments green-margined;  ligules 
usually not auricled...............-.-.- 9. J. parous. 
Perianth segments fuscous or dark brown; 
ligules produced into smal] auricles... ... 10. J. saximontanus, 
Leaves neither septate nor equitant. 
Leaves hollow; flowers few, in small heads. 
Stems leafy only at base; perianth about 4 mm. 
long; lower bracts of inflorescence mem- 
branouS......-..- 0 eee eee eee eee eee eens ll. J. triglumis. 
Stems leafy throughout; perianth segments 5 to 6 
mm. long; lower bracts foliaceous...........-. 12. J. castaneus. 
Leaves not hollow; flowers numerous. 
Flowers not bracteolate, in true heads on branches 
of the inflorescence; leaves broad and grass- 
like.........22 222-2222 eee eee 13. J. longistylis. 
Flowers bracteolate, inserted singly on the branches 
of the inflorescence; leaves narrowly linear, 
flat, or subterete and channeled. 
Annual; stems branched........--...-.------- 14. J. bufonius. 
Perennials; stems simple. 
Auricles cartilaginous, yellowish brown; 
bracts usually elongated, much ex- 
ceeding the inflorescence........-..- 15. J. dudleyi. 
Auricles scarious or membranaceous; bracts 
usually much shorter, hardly ex- 
ceeding the inflorescence, 
