WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 459 
Order 37. MYRTALES. 
KEY TO THE FAMILIES. 
Styles wanting; aquatics.............-----2+++++-- 101. GUNNERACEAE (p. 473). 
Styles present; land plants. 
Hypanthium merely inclosing the ovary... ..--- 99. LYTHRACEAE  (p. 459). 
Hypanthium adnate to the ovary......-.-------- 100. EPILOBIACEAE | (p. 459). 
99. LYTHRACEAE. Loosestrife Family. 
1. LYTHRUM L. LooseEstrire. 
Herbs with simple sessile entire leaves and slender angled stems; flowers perfect, 
dimorphous, mostly solitary in the axils; hypanthium short, tubular or narrowly 
funnelform, about 5mm. long; petals 4 to 6, rose purple; stamens 8 to 12; ovary 2-celled, 
superior, becoming 1-celled by the breaking down of the septum; seeds several. 
1. Lythrum linearifolium (A. Gray) Small, Fl. Southeast. U. S. 828. 1903. 
Lythrum alatum linearifolium A. Gray, Bost. Journ. Nat. Hist. 6: 188. 1850. 
Type LocALIty: ‘Rocks in the Cibolo River,’’ Texas. 
RANGE: Texas to Arizona, south into Mexico. 
New Mexico: Black Range; Dog Spring; Organ Mountains; Mogollon Mountains: 
Fresnal; Roswell. Wet ground, in the Upper Sonoran and Transition zones. 
(100. EPILOBIACEAE. Evening primrose Family. 
Annual or perennial herbs, rarely somewhat shrubby; leaves simple, alternate or 
opposite, exstipulate; flowers 2 or 4-merous, mostly conspicuous, small in two or three 
genera, axillary, spicate, or racemose, regular or slightly irregular; hypanthium mostly 
tubular and more or less elongated, sometimes spreading; sepals 2 or 4; petals of the 
same number; stamens as many as the sepals or twice as many; pistil usually of 4 
carpels, with one style and 1 to 4 more or less united stigmas; fruit a 4-valved capsule, 
sometimes indehiscent and nutlike. 
KEY TO THE GENERA. 
Flowers 2-merous; fruit indehiscent, obovoid, bristly 
with black hairs.........--.-------+----+-++-+--- 1. Crrcaka (p. 460). 
Flowers 4-merous; fruit various. 
Fruit indehiscent, nutlike..........-.---------+- 2. GauRA (p. 461). 
Fruit a dehiscent capsule. 
Seeds with a tuft of silky hairs. 
Flowers bright deep red.....----.------- 5. ZAUSCHNERIA (p. 464). 
Flowers purple to white, never bright red. 
Iypanthium not prolonged beyond the 
ovary; flowers about 2 cm, in 
diameter.....-.----2.0-2----+-- 3. CHAMAENERION (p. 463). 
Hypanthium prolonged beyond the 
ovary; flowers less than 1 cm. in 
diameter...........---------- 4, Eprioprum (p. 463). 
Seeds without a tuft of silky hairs. 
Hypanthium not prolonged beyond the 
ovary; flowers minute........------ 6. 
Hypanthium prolonged beyond the ovary; 
flowers much larger. 
Stigmas discoid or capitate. 
Stigmas capitate; annuals....-.-- 7. SPHAEROSTIGMA (p. 465). 
Gayopnytum (p. 464). 
os 
