8 NORTH AMERICAN FLORA [V01.TJME 22 



Plants with small corras. 19. Hasseanthus. 



Petals distinct. 



Petals hooded. 20. Diamorpha. 



Petals not hooded. 

 Carpels erect. 



Flowers yellow, arranged in panicles. 21. Cremnophila. 



Flowers never arranged in panicles. 

 Flowers not white, often polyg- 

 amous. 22. Rhodiola. 

 Flowers white, perfect ; Mexican 

 species. 23. Sedastrum. 

 Carpels usually spreading : flowers perfect. 

 Annuals ; carpels 4 ; calyx-lobes broader 



than long; styles minute, 24. Tetrorum. 



Perennials (mostly) ; carpels generally 5 ; 

 sepals longer than broad ; styles 

 slender. 25. Sedum. 



1. BRYOPHYLLUM Salisb. Par. I.ond. pL 3. 1805. 



Crassuvia I^am. iBncycl. 2 : 141, as synonym. 1786. 



Erect fleshy perennial herbs, with opposite simple or pinnately compound leaves. 

 Flowers perfect, nodding, in cymes or panicles opposite the branches. Sepals 4, united 

 into an inflated cal}^^. Corolla subcampanulate to urceolate, the limb with 4 spreading 

 lobes. Stamens 8, in two series, adnata to the corolla-tube ; filaments filiform. Disk with 

 4 oblong glands. Carpels 4, distinct or partly united. Ovules numerous. Follicles 4. 



Type species, Bryophyllum calycinum Salisb. 



1. Bryophyllum pinnatum (lyam.) Kurz, Jour. Asiatic Soc. 



Bengal 40': 52. 1871. 



Cotyledon pinnata I^am. Kncycl. 2 : 141. 1786. 

 Bryophyllum calycinum Salisb. Par. I^ond. pi. 3. 1805. 



Glabrous, stem branched, 4-15 dm, tall. Leaves 1-3 dm. long, often pinnately com- 

 pound, the leaflets oblong to elliptic, thick, obtuse, crenate, the terminal one much larger 

 than the lateral ones ; panicles 1-4 dm. long, many-flowered ; caljrx becoming oblong-cam- 

 panulate, 3-3,5 cm. long, veiny; corolla reddish, longer than the calyx, its lobes lanceo- 

 late to ovate-lanceolate, acute. 



Type locality : Molucca Islands. 



Distribution : Bermuda ; Florida ; throughout the West Indies and tropical America. Nat- 

 uralized from Asia. 



Illustrations : Salisb. loc. cit. ; Bot. Mag. pi. 1409 ; I/)dd. Bot. Cab. pi. 877. 



2. TILLAEA (Micheli) I,. Sp. PL 128. 1753. 



Minute glabrous annual herbs, with opposite entire leaves and very small axillary, clus- 

 tered flowers. Calyx 3-5-parted. Petals 3-5, distinct, or united at the base. Carpels 3-5, 

 distinct ; styles short, subulate. Ovules usually few. Carpels 1-2-seeded. 



Type species, Tillaea muscosa Iv. 



Calyx-segments 1 mm. long. 

 Calyx-segments 2 mm. long. 



1. T. erecta. 



2. 7". connata. 



1. Tillaea erecta Hook. & Arn. Bot. Beech. Voy. 24. 1830. 



Tillaea minima Miers ; Hook. & Arn. in Hook. Bot. Misc, 3 : 338. 1833. 

 Tilla&a lepiopetala Benth. PI. Hartw. 310. 1849. 

 Tillaea -minima suhsimplex S. Wats. Bot. Calif. 1 : 208. 1876. 

 Crassula minima Reiche, Fl. Chile 2 : 369. 1898. 



Tufted, branched, 8 cm. high or less, the branches erect or ascending. Leaves connate 

 at base, ovate to oblong, acute, 1.5-3 mm. long; flowers in axillary bracted clusters; pedi- 

 cels very short, or often filiform and as long as the leaves or longer ; sepals mostly 4, ovate, 

 acute, about 1 mm. long, somewhat longer than the narrowly lanceolate acuminate petals ; 

 seeds commonly solitary. 



Type locality : Conception, Chile. 



Distribution : In sandy or rocky soil, Oregon to Lower California, and in Chile, 



