ORDEm 153.— SPIDERWORTS. 301 



Analysis of the Genera. 



§ Perianth greenish outside, yellow inside. Stamens 6. 



Stigma 1. Seeds many. Leaves sword-shaped. 



Scape nearly naked. Nartheeium. Naetheoium. 



§ Perianth green orhrownish. Stamens 6. Stigmas 8. 



Capsule 3-oelled, 8-seeded. Stems leafy, jointed. 



Eeaves linear. Wood Bush. Lu'zula. 



§ Perianth green or brownish. Stamens 6, rarely 8. 

 . Stigmas 8. Capsule many-seeded. Leaves terete, 



or linear, or none. SxaJi. Bvllrmh. Jdn'cds. 



■Fig. €65. Flower of Lazula, much magnifled: p, the green peri- 

 anth ; «, the 6 stamens; cc, the 3 stigmas. 



Order CLII. COMMELYNACE^. Spiderworts. 



^ Herbs with flat, narrow leaves which are usually sheathing at base; 

 perianth of 2 circles, outer of 3 green sepals, inner of 3 colored petals; 

 stamens 6, on the torus ; ovary 2 or 3-oelIed ; style and stigma 1 ; 

 capsule 2 or 3-celled, with few seeds. 



Analysis of the Genera. 

 % Flowers irregular, clustered in a heart-shaped floral leaf. Commelt'ita. 



S Flowers regular, clustered, floral leaf like the rest. Spiderwort. Tbadescan'tia. 1 

 § Flowers regular, solitary, axillary. Stamens 3. Moss-like herbs. S. Maya'ca. 



TBADESOAN'TIA. Spiderwort. 



Flowers regular, in terminal, close umbels, subtended by 2 or 8 leaf-like 

 bracts. Petals broad, larger than tie sepals, filaments clothed with 

 jointed hairs. Juice viscid, spinning into cobwebs. 

 § Leaves linear, sessile, not narrowed at the base, smooth. . . .1, 2 

 § Leaves ovate or lanceolate, narrowed at base, hairy 3, i 



1 T. Virgin'ica. Common S. Leaves broadJinear. Umbel many-flowered, ses- 



sile, terminal, with 2 leaf-like bracts. Petals large, blue or white. 



2 T. ro'sea. Soseate S. Leaves linear, long. tTmbel fsw-flowered, with 2 sub- 



ulate bracts. Petals twice longer than sepals, rose-colored. Penn. S. 

 3 T. pilo'sa. Hairy S. Leaves lanceolate, long-pointed. Umbels both terminal and 



a\illa}-y, mauy-flpwers. Petals small, bluish-purple. W. 

 1 T, prassifo'lia. Thick-la. S. Leaves ovate, some petiolate, acute, woolly be:ieath. 



Flowers small, rose-purple, terminal. Stem weak. Leaves striped, -j- 



