536 
10. 
12% 
15. 
16. 
NORTH AMERICAN FLORA [VoLUME 22 
Insert: 
5a. Tillaeastrum latifolium Rose, Contr. U. S. Nat. Herb. 13: 301. 1911. 
Delicate annual, 2-3 cm. high. Leaves opposite, somewhat connate at base, 1 or 2 
pairs below the flowers, the upper ones congested, lanceolate, acute or even apiculate, 
the margin serrulate; flowers axillary and solitary but often appearing as if in an umbel of 
10 or more; pedicels filiform, 10-15 mm. long; sepals 3 or 4, filiform, 2.5 mm. long; petals 
broadly oval to orbicular, 1 mm. long, shorter than the carpels; stamens 3 or 4; carpels 
3 or 4, purplish, each with 10 or more seeds. 
TYPE LOCALITY: Nevada de Toluca, Mexico. 
DISTRIBUTION: Known only from the type locality. 
. Sempervivum tectorum. 
Add to the illustrations: Britt. & Brown, Ill. Fl. ed. 2. f. 2143. 
. Pachyphytum bracteosum. 
Add to the illustrations: Addisonia pl. 67. 
. Pachyphytum longifolium. 
Add: ILLustraTion: Addisonia pl. 4. 
Insert: 
5a. Pachyphytum compactum Rose, Contr. U. S. Nat. Herb. 13: 301. 1911. 
Caulescent, 10 cm. or more high. Leaves closely set at right angles to the stem, very 
fleshy but somewhat flattened, purplish, a little glaucous, acute, 2—2.5 cm. long; flowering 
stem 4 dm. long; leaves on flowering stem minute; flowers 7-10, racemose; corolla 8 mm. 
long; petals broad, reddish except the green tips, acute. 
TYPE LOCALITY: Ixmiquilpan, Hidalgo. 
DISTRIBUTION: Known only from the type locality. 
ILLUSTRATION: Contr. U. S. Nat. Herb. 13: pl. 61. 
Insert: 
4a. Echeveria Pittieri Rose, Contr. U. S. Nat. Herb. 13: 296. 1911. 
Caulescent, 10 cm. or more high, crowned at the apex by a loose rosette of leaves, 
glabrous throughout. Leaves 6-8 cm. long, oblanceolate, tapering into a distinct petiole, 
acute, greenish or somewhat purplish, sometimes a little glaucous; flowering stem about 
20 cm. long, leafy, the leaves similar to the stem-leaves; inflorescence a dense spike 4-5 cm. 
long; flowers subtended by small linear rose-colored bracts and two inner bractlets; 
calyx cleft nearly to the base into linear, acute lobes about two thirds the length of the 
corolla, rose-colored; corolla when in bud somewhat 5-angled; corolla about 12 mm. long, 
deeply cleft, the lobes stiff, erect or slightly spreading, acute, rose-colored, with a pro- 
nounced pocket near the base within; stamens 10, the 5 opposite the petals inserted just 
above this pocket, the other 5 attached to the corolla but lower down; ovaries erect 
tipped by the long, slender styles. 
TYPE LOCALITY: On the volcano Ipala, Guatemala. 
DISTRIBUTION: Known only from the type locality. 
Insert: 
6a. Echeveria leucotricha A. Purpus, Monats. Kakt. 24:65. 1914. 
Cespitose. Basal rosettes densely leafy, the leaves oblong to spatulate, obtuse, thick: 
6-8 mm. long, covered with dense soft white pubescence; flowering stem 3-4 dm. long» 
leafy below, pubescent; inflorescence spicate; flowers in the axils of large bracts; sepals 
5, 1 em. long, free to the base, tomentose; petals free nearly to the base, linear-lanceolate, 
acuminate, 2 cm. long. 
TYPE LOCALITY: San Luis Tultitlanapa, Pueblo. 
DISTRIBUTION: Known only from the type locality. 
ILLUSTRATION: Monats. Kakt. 24: 67. 
. Echeveria multicaulis. 
Add: ILLustraTion: Addisonia pl. 52. 
