106 ASCLEPIADACEAE 



Locs. — Brawley, Parish 8327 ; Alamo Eiver, Calexico, Parish 8328; Box Canon, Blair Valley, 

 e. San Diego Co., Jepson 8708 ; Palm Canon of Mt. San Isidro, Jepson 8801 ; San Felipe Gap, 

 T. Brandegee; Palm Canon, Mt. San Jacinto, Jepson 1393a; San Gorgonio Pass, Jepson 6071; 

 San Bernardino, Parish 3814; Claremont, C. F. Baker 3676; San Jacinto, Gregory; Aguanga, sw. 

 Riverside Co., Jepson 1483; Santa Ana Caiion, near Anaheim, J. T. Howell 2819; San Luis Eey, 

 San Diego Co. (S}-n. FI. 2:88). 



Refs. — Philibertia heterophylla Jepson, Man. 770, fig. 757 (1925). Sarcostemma hetero- 

 phyllum Bngeim.; Torr., Pao. E. Rep. 5:362 (1857), type loc. Ft. Yuma, Cal., Thomas <S- DuBarry. 

 Philibertia linearis Gray var. heterophylla Gray, Syn. Fl. 2:88 (1878). Philibertella hartwegii 

 Vail var. heterophylla VaU, Bull. Torr. Club 24:308 (1897). Philibertella heterophylla Ckll., Bot. 

 Gaz. 26:279 (1898). Funastrum heterophyllum Sta., Contrib. U. S. Nat. Herb. 23:1170 (1924). 



2. P. hirtella Parish. Trailing Townula. Stems running widely over the 

 ground, often twining a little or climbing over low shrubs, 3 to 10 feet long, the 

 nodes remote; herbage villous-puberulent; leaf -blades linear to linear-lanceolate, 

 acute or acutish at both ends, 1 to 3 inches long, 1 to 4 lines wide, shortly petioled; 

 flowers 2Y2 lines broad; calyx-lobes linear-lanceolate; corolla greenish-yellow, its 

 lobes ovate, 1 to 1^/4 lines long; stamen-appendages subglobose, longer than broad, 

 attached on the inside to the stamen-column and below to the even ridge-like crown 

 borne on the corolla-tube; follicles narrowly lanceolate, attenuate, 2 inches long. 



Ravines and dry washes, 500 to 3500 feet: Colorado Desert; eastern Mohave 

 Desert; Inyo Co. East to Arizona and southern Nevada. Apr. -May. 



Locs. — Vallecito, e. San Diego Co., Jepson 8549a; San Felipe Creek, T. Brandegee ; Palm 

 Canon of Mt. San Jacinto, Newlon 451 ; Painted Caiion, Mecca Hills, Jepson 11,073 ; Piuon Well 

 to County Well, Riverside Co., Jepson 6010; Pinto Basin, s. Mohave Desert, Jepson 12,627; 

 Chuekwalla Mts., Schcllenger ; Lone Willow Spr., near Bro-\vn Mt., Parish 10,213; Panamint Mts. 

 (Contrib. II. S. Nat. Herb. 4:149). 



Refs.— Philibertia HIRTELLA Parish, Muhl. 3:126 (1907) ; Jepson, Man. 771, fig. 758 (1925). 

 Sarcostemma heterophyllum Engelm. var. hirtellum Gray, Bot. Cal. 1:478 (1876), type loc. Ft. 

 Mohave, Ariz., Cooper. Philibertia linearis Gray var. hirtella Gray, Syn. PI. 2:88 (1878). Phili- 

 bertella hirtella Vail, Bull. Torr. Club 24:309 (1897). Funastrum hirtellum Schlechter; Fedde, 

 Rep. Spec. Nov. 13:286 (1914). 



3. GONOLOBUS Michx. 



Ours twining herbs with opposite leaves. Flowers similar to Philibertia, borne 

 in axillary umbels or in ours commonly solitary. Base of corolla (in ours) bearing 

 a cup-like crown attached to the stamen-column by thin plates. Anthers (in ours) 

 with thin scarious appendages inflexed over the summit of the stylar disk. — Species 

 about 70, North and South America. (Greek gonia, angle, and lobos, pod, one of 

 the early species with angled fruits. ) 



1. G. hastulatus Gray. Stems much branched, freely twining, 8 to 14 inches 

 long; herbage puberulent; leaf-blades cordate-sagittate, tapering-acuminate, 3 to 

 5 lines long, on petioles V2 to % as long; flowers 1 or rarely 2 in the axils, on pedicels 

 ^ to Yo line long; peduncles none; flowers dull greenish, 2 lines long; calj-x-lobes 

 narrowly lanceolate, obtusish; corolla subrotate, deeply parted into oblong or 

 short-lanceolate lobes, pubescent on the inside; sinuses of the corolla with short 

 but distinct processes downwardly produced; corolla-tube bearing at base a 5- 

 lobed corolla-like crown which is united to the stamen-column by 5 thin vertical 

 lamellae, the crown thus, as it were, 5-celled and nearly equalling the stamen- 

 column. 



Dry valleys, 900 to 1100 feet : eastern Mohave Desert; Colorado Desert. South 

 to Lower California. Apr. 



Locs. — Kelso, ace. P. A. Mum ; Cottonwood Sprs., ace. P. A. Mum ; Yaqui Well. 



Eefs. — GoNOLOBUS hastulatus Gray, Proc. Am. Acad. 12:78 (1870). Lachnosloma hastu- 

 latum Gray, Proe. Am. Acad. 11:87 (1876), type loc. Caiion Tantillas, n. L. Cal., Palmer. Vince- 

 toxicum hastulatnm Hel., Muhl. 1:2 (1900). G. calif ornieus Jepson, Man. 771 (1925), type loc. 

 Yaqui Well (Ironwood Well), w. Colorado Desert, T. Brandegee. 



