FLORA OF THE DISTRICT OF COLUMBIA. 119 



1 



2. Juncus canadensis J. Gay. 



Meadows and wet grounds; frequent. Aug.-Oct. Eastern N. Amer.; S. Amer. 

 (/. canadensis longicaudatus Engelm.) 



13. Juncus subcaudatus (Engelm.) Coville & Blake. 



Wet grounds; rather uncommon. July-Sept. Eastern N. Amer. (/. canadensis 

 subcaudatus Engelm.) 



14. Juncus acuminatus Michx. 



Abundant in wet places. June-Sept. Eastern N. Amer.; Northwest Coast; Mex. 

 (/. acuminatus legitimus Engelm.) 



2. JTJNCOIDES Adans. Wood-rush. 



Perianth about equaling the capsule, 2-3 mm. long; base of plant bulblet-bearing; 

 rays of the inflorescence mostly ascending 1. J. campestre bulbosum. 



Perianth much exceeding the capsule, 2.8-4 mm. long; base of plant not bulblet- 

 bearing; some of the rays strongly divergent 2. J. campestre echinatum. 



1. Juncoides campestre bulbosum (A.Wood) Coville & Blake. Bulbous wood-rush. 

 Apparently not as common in the District as the next. Apr. -May. Eastern N. 



Amer. (Luzula cavipestris of Ward's Flora, in part; /. bulbosum Small.) 



2. Juncoides campestre echinatum (Small) Coville & Blake. 



Apparently the common form of the District. Apr.-May. Eastern N. Amer. 

 ( /. echinatum Small.) 



Much more collecting is required before the relative abundance of our two forms 

 can be established. Material should be collected only in fairly ripe fruit. 



25. MELANTHIACEAE. Bunch-flower family. 



Flowers solitary, terminal or opposite the leaves; basal leaves undeveloped; capsule 

 breaking midway between the septa; perianth lobes more than 1 cm. long. 



7. TTVULARIA. 

 Flowers numerous, in a terminal inflorescence; plants with well-developed basal 

 leaves; capsule opening at the septa; perianth lobes 1 cm. long or less. 

 Flowers in racemes. 

 Plants without bulbs; anthers oblong, 2-celled. 

 Flowers perfect, in loose racemes, each flower with 3 bractlets; leaves linear. 



1. TOFEELDIA. 

 Flowers dioecious, in spikelike racemes, not bracted; leaves oblanceolate. 



2. CHAMAELmniM. 

 Plants with bulbs; anthers confluently one-celled. Flowers perfect, bracted. 



3. CHEOSPERMA. 

 Flowers in panicles. Anthers cordate, one-celled ; inflorescence polygamo-monoecious. 

 Plants glabrous, from a bulb; sepals lanceolate, broadest at the base. 



4. STENANTHroM. 

 Plants with pubescent stems, from a rootstock; sepals narrowed at the base. 

 Perianth segments clawed; leaves long and narrow.. 6. MELANTHIUM. 

 Perianth segments nearly sessile ; leaves broadly oval 6 . VERATRUM . 



1. TOFIELDIA Huds. 



1. Tofieldia racemosa (Walt.) B. S. P. False boo asphodel. 



Open swampy ground; region beyond Beltsville and Suitland; rare. July. South- 

 ern N. J. to Fla. {T. pubens Michx.) 



2. CHAMAELmniM Willd. 



1. Chamaelirium luteum (L.) A. Gray. Blazing star. Devil's-bit. 



Moist hillsides in open woods; Rock Creek and upper Potomac regions; once found 

 near the Reform School. May. Eastern U. S. (C carolinianum Willd.) 



The characteristic spatulate-leaved evergreen rosettes of this plant are conspicuous 

 n winter. 



