TO 



I'ONTEDERIACEAE, the Pickerel-weed Family 



Aquatic herbs, with 6 rather conspicuous petals; flowers in 

 summer. 



la. Flowers blue; leaves cordate-sagittate (3 10 dm. high) 



Pickerel-weed, Pontederia cordata. 



Ib. Flowers yellow; leaves linear (submerged) 



Mud Plantain, Heteranthera dubia. 



JUNCACEAE, the Rush Family 



Grass-like or rush-like plants, with inconspicuous greenish or 

 brownish flowers, of 3 chaffy or scale-like sepals and as many similar 

 petals. 



la. Leaf-sheaths closed; capsule 1-celled and 3-seeded; stem or 

 leaves usually hairy at or near the base (1 4 dm. high), (Wood 

 Rush) 2. 



Ib. Leaf-sheaths open; capsule many-seeded; plants never hairy 4. 



2a. Flowers solitary at the ends of the branches of the umbel- 

 like cluster (spring) Wood Rush, Luzula saltuensis. 



2b. Flowers in spikes or dense clusters 3. 



3a. Flower-cluster spike-like, nodding at the tip (summer) 



Wood Rush, Luzula spicata. 

 3b. Flower-cluster umbel-like (spring) 



Wood Rush, Luzula campestris var. multiflora. 



4. The genus Juncus, or Rush, ocntains about 25 species in 

 Michigan, blooming in summer or autumn. For their identifi- 

 cation the Manuals should be consulted. One of the commonest 

 species is Juncus effusus, growing in marshes, with erect leaf- 

 less cylindrical stems, bearing a lateral cluster of flowers near 

 the summit. Another common speciBs is Juncus tennis, with 

 slender stems and linear leaves, growing in hard ground, espe- 

 cially in woodland paths. 



LILIACEAE, the Lily Family 



Herbs or twining shrubs, with generally conspicuous flowers; 

 sepals and petals each 3, and usually colored alike, stamens 6, ovary 

 3-celled, superior. In one species the perianth is 4-parted and the 

 stamens are 4. 



la. Flowers or flower-clusters lateral, axillary or apparently so 2. 

 Ib. Flowers or flower-clusters scapose or terminal 12. 



2a. Leaves minute and scale-like (7 15 dm. high; flowers 

 greenish-yellow, June) Asparagus, Asparagus officinalis. 



2b. Leaves broad and flat, not scale-like 3. 



