212 | CRASSULACE, . “TILLAA. 
as SEDUM. 
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. Tillea. 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 TILLAA 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. 
* TILLHA PROPER. Flowers clustered: petals acuminate; hypog- 
ynous; scale minute or none: carpels 1-2-seeded. 
T. minima Miers Tray. 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: 
earpels not longer, acute: seed usually solitary. On wet rocks etc., South- 
ern Oregon to California and Chile. 
* * Bartarpia 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'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 verticillate) leaves and flowers in 
eymes. 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 dicecious in'a regular compact compound cyme, 
deep purple or becoming so, leaves flat, serrate. 
~ §. Rhodiola DC. FI. Franc. ed. 3, iv, 386. Stems simple, nearly erect, 
rom a thick perennial root 1-10 inches high, leafy: leaves alternate, oblong- 
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