212 CRASSULACE^E. till^ea. 



SEDDM. 



alternate with them or twice as many, inserted with the petals 

 or adnate to their base: filaments subulate or linear filiform: 

 anthers introrse. Ovaries always equal in number to the petals 

 and opposite to them with numerous, or rarely few, ovules in 

 two rows: carpels follicular in fruit, subulate with the persist- 

 ent style, usually many-seeded, opening by the inner suture. 

 Seeds anatropous, with a membranaceous often loose testa. 

 Embryo straight in the axil of thin fleshy albumen. 



1. Tillsea. Parts of the flowers 3-5. Small annuals with opposite leaves 

 and minute axillary flowers. 



2. Sedum. Parts of the flowers 4-7: stamens twice as many: petals dis- 

 tinct, : 



3. Cotyledon. Parts of the flower in five, stamens ten. Petals somewhat 

 united. 



1 TILLSEA Micheli Gen. t, 20. 



Small and slender somewhat succulent glabrous annual with 

 opposite entire leaves and minute axillary flowers. Sepals and 

 petals 3-4, distinct or united at base. Stamens as many ; carpels 

 distinct : style short-subulate : ovules one to many. Seeds longi- 

 tudinally striate. 



* Till^ea propkr. Flowers clustered: petals acuminate, hypog- 

 ynous; scale minute or none : carpels 1-2-seeded. 



T. minima Miers.Trav. Chil. ii, 530. Diffusely branched, 1-3 inches 

 high, erect or ascending: leaves ovate to oblong, connate at base, acute, 

 about a line long : flowers in short leafy axillary panicles, nearly sessile or 

 on pedicels a line or two long : sepals 4 scarcely half a line long, oblong- 

 ovate, acute, a little exceeding the linear-lanceolate acuminate petals: 

 carpels not longer, acute : seed usually solitary. On wet rocks etc., South- 

 ern Oregon to California and Chile. 



* * Baltardia DC. Flowers solitary ; petals oval or oblong, hy- 

 pogynous : scale linear: carpels, several-seeded. 



T. angustifolia Nutt, T. & G. Fl. i, 558. Branching from the base, 

 1-2 inches high, rooting; leaves linear, acute connate ; flowers 'axillary, 

 usually solitary, on very short pedicels; segments of the calyx 4, ovate 

 about half the length of the ovate obtuse-petals, carpels broad o v <tuse 

 many-seeded, styles none, seeds linear-oblong. On muddy flats, "Washing- 

 ton to California. 



2 SEDUM L. Gen. n. 579. 



Herbs or rarely suffrutescent plants with alternate or scat- 

 tered (rarely opposite or verticil late) leaves and flowers in 

 cymes. Sepals usually 5, rarely 4 or 6-7, more or less united at 

 base, usually turgid. Petals distinct, mostly spreading. Sta- 

 mens twice the number of the petals. Carpels as many as the 

 sepals, many-seeded, with an entire scale at the base of each. 



* Flowers mostly dioecious in a regular compact compound cyme, 

 deep purple or becoming so, leaves flat, serrate. 



S. Rhodiola DC. Fl. Franc, ed. 3, iv, 386. Stems simple, nearly erect, 

 rom a thick perennial root 1-10 inches high, leafy: leaves alternate, oblong- 



