168 CRASSULACEAE. 



Leaves very glaucous. 5. D. elongata. 



Leaves not at all glaucous at flowering 



time. 6. D. lurida. 



1. D. pulverulenta (Nutt.) B. & R. Densely white-mealy 

 throughout; caudex short and very stout; rosulate leaves rather 

 thin and flaccid, in a flattened large rosette, broadly spatulate, 

 abruptly acute, 5-10 cm. long; scapes 4 dm. high or more, stout 

 with broadly cordate rather numerous acute leaves, the lower 

 sometimes ovate, acuminate; inflorescence of 2-6 elongated simple 

 racemes; pedicels mostly horizontal, slender, 6-15 mm, long; flowers 

 erect or ascending; sepals ovate, acute, 4-6 mm. long; corolla some- 

 what contracted above, reddish, about 14 mm. long, petals carinate 

 wdth a prominent mealy-glaucous midvein. ( Cotyledon pulverulenta 

 Benth. & Hook.) 



Frequent in the chaparral belt on rocky slopes in all our moun- 

 tains. July-August. 



2. D. minor Rose. Acaulescent, or very old plants with a 

 carrot-shaped rootstock 5 cm. long, crowned by a small rosette of 

 spreading leaves; leaves rhomboid-ovate, the large ones 5-7 cm. 

 long, narrowed at base, abruptly acuminate, glaucous; inflorescence 

 slender, with a few elongated 1-sided racemes; pedicels slender, 

 10-15 mm. long; calyx 5-7 mm. long, its lobes ovate to ovate- 

 lanceolate, acute; corolla yellow or pale orange, 12 mm. long, its 

 tube 2 mm. long. 



Originally described from plants collected by Dr. Hasse in the 

 San Gabriel Canyon, altitude about 2000 feet. Wilson's trail, 

 altitude 2500 feet, on rocky banks. The true relationship of this 

 and the following is not clear; they need intensive study in the field 

 and garden. 



3. D. ovatifolia Britton. Glabrous, low, green, 1.5 dm. high or 

 less; flowering stems rigid; basal leaves ovate, shining above, acute, 

 about 2 cm. long; leaves of the flowering stems ovate, or the lower 

 ovate-lanceolate, obtuse or the lower acute, 5-8 mm. long; cymes 

 few-flowered; pedicels very slender, 1 cm. long or less; flowers about 

 1 cm. long; calyx segments triangular-ovate-lanceolate, about 2.5 

 mm. long, nearly as long as the corolla-tube; corolla bright yellow, 

 its segments lanceolate, acute. 



Described from specimens collected in the Santa Monica Moun- 

 tains by H. M. Hall. 



4. D. brauntoni Rose. Caespitose, the rootstocks crowned by 

 6-8 rosettes of leaves; leaves elongated, strap-shaped, becoming 

 20 cm. long and 2 cm. broad, but often at flowering time only 10 

 cm. long and 1 cm. broad, pale green and very glaucous on the 

 face, acute; flowering stems usually stout, 3-6 dm. long, pale green, 

 their lower leaves often quite large, the upper ones ovate, acute, 

 thickish, slightly cordate at base; inflorescence at first somewhat 

 compact, of 3-4 branches, these finally much elongated, 1-2 dm. 

 long; pedicels very short, 1-3 mm. long, not elongated in fruit; calyx- 

 lobes broadly ovate, 4-5 mm. long, acute; segments of corolla pale 

 greenish yellow, 10-12 mm. long, erect. 



Described from plants collected by Ernest Braunton on Elysian 

 Hills, Los Angeles. 



