2424 



PACHIRA 



within, rusty colored without; siaminal tube long, 

 pubescent, the stamens shorter than the petals: caps, 

 ovoid, 7 ii long byjo in..<Iiam. Panama. 



AAA. Caps, ovate-elongated, its diam. less than half the 

 length. (Dolichocarpx.) 



B. Fls. hardly over 4 in. long. 



pulchra, Planch. & Lind. A small tree: Ivs. 7-f olio- 

 late; Ifts. briefly petiolulate, cuneate-oblong or lanceo- 

 late, glabrous: fl. about 4 in. long; calyx cup-like, 

 tomentose-pubescent outside; petals linear-oblong, 

 greenish pink within, tomentose and brownish without; 

 staminal tube short, the stamens hardly as long as the 

 petals: caps, not known. Ocana Mts., Colombia. 



BB. Fls. 10 in. long or more. 



specidsa, Triana & Planch. A tree about 150 ft. 

 high: Ivs. 7-foliolate; Ifts. briefly petiolulate, cuneate- 

 oblong, glabrous, 4-8 in. long: fl. about 10 in. long; 

 calyx cuplike, brownish pubescent without; petals 

 oblong, long-attenuated, yellowish white inside, 

 minutely tomentellose outside; staminal tube long, 

 pubescent without, the white stamens nearly as long 

 as the petals: caps, not known. Colombia. 



aqu&tica, Aubl. (P. grandiflora, Tussac). A small 

 tree: Ivs. 5-7 (9) -foliolate; Ifts. subsessile, obovate to 

 elliptic-lanceolate, glabrous, 4-12 in. long: fls. 8)^-14 

 in. long; calyx tubulose-truncate, often warty at the 

 base; petals laciniate, more or less deeply pinkish or 

 purplish; staminal tube long, the red or scarlet fila- 

 ments about as long as the petals: caps. 7-15 in. long, 

 3-5 in. diam. Trop. Amer., including W. Indies. G.C. 

 III. 40:308. P. aquatica varies considerably according 

 to the nature of the soil in which it grows and to its 

 environment, and it is not unlikely that most so-called 

 species described in horticultural reviews should be 

 considered as simple varieties of the same. This species 

 is the best known in the genus and its area of distribu- 

 tion is very extensive; its cult, in hothouses has been 

 often attempted and it has lately been intro. in Fla. 

 under the name of P. insignis. P. stenopetala, in Gt. 

 9:302, is probably a cult, form of P. aquatica. 



P. dlba, Walp., is evidently a Bombax. B.M. 4508. Generally 

 speaking, there is a great confusion as to the identification of the 

 several species, most of which are not represented even in the 

 larger herbaria. P. minor, Hemsl., known to us only by a poorly 

 executed plate in B. M. 1412, may be a variety of P. aquatica. 



H. PlTTlER. 



PACHISTIMA (said to be derived from Greek, 

 pachys, thick, and stigma; alluding to the slightly 

 thickened stigma). Spelled also Pachystima and Pachy- 



2695. Pachycereus Pringlei. 



PACHYCEREUS 



stigma. Celastraceae. Ornamental woody plants some- 

 times grown for their evergreen foliage. 



Low evergreen shrubs: branchlets somewhat quad- 

 rangular, verrucose: Ivs. opposite, small, serrulate or 

 entire, short-petioled, with minute deciduous stipules: 

 fls. perfect, small, in few-fld. axillary cymes; calyx- 

 lobes, petals and stamens 4; ovary 2-celled, often only 

 1 cell developing into a small, oblong, 1-seeded caps. 

 Two species in the mountains of N. Amer.; allied to 

 Evonymus. 



These are low trailing or spreading shrubs with small 

 evergreen foliage and inconspicuous reddish flowers 

 followed by small dull-colored capsules. They are 

 hardy with slight protection in the Arnold Arboretum, 

 Boston, and are handsome dwarf evergreens for rock- 

 eries or rocky slopes; P. Canbyi forms a dense carpet 

 and may be used as a border plant for evergreen shrub- 

 beries. They seem to grow in any well-drained soil. 

 Propagation is by seeds or by layers; also by cuttings of 

 half-ripened wood under glass, and P. Canbyi also by 

 division. 



myrsinites, Raf. (Myginda myrtifolia, Nutt. Ored- 

 phila myrtifolia, Nutt.). Spreading shrub, to 2 ft.: Ivs. 

 broadly elliptic to oblong-obovate, slightly revolute at 

 the margin and serrulate or almost entire, 3^-1 in. long: 

 fls. short-stalked, reddish: fr. about J^in. long. May- 

 July. Brit. Col. to Calif, and N. Mex. Resembles the 

 small-lvd. form of Evonymus radicans, but of more 

 rigid and stiff growth. 



Canbyi, Gray. Dwarf shrub with trailing and root- 

 ing branches, scarcely exceeding 1 ft.: Ivs. narrow- 

 oblong, occasionally obovate, revolute and usually ser- 

 rulate above the middle, ^-%in. long: fl. -stalks fili- 

 form, longer than half the If.; fls. reddish. April, May. 

 Mts. of Va. This is somewhat similar in habit and 

 foliage to Evonymus nanus, but less vigorous and of 

 more even and regular growth. Sometimes called rat- 

 stripper. ALFRED REHDER. 



PACHYCEREUS (Greek, thick and cereus). Cactacex. 

 Usually trees, more or less branched, with very definite 

 woody trunks. 



Flowers appearing during the day, with rather short 

 tubes; petals short; stamens included; ovary and tube 

 of fl. covered with small bracts bearing wool, hairs, and 

 bristles in their axils: fr. large, burlike; seeds large 

 and black. The genus consists of 10 species segregated 

 from Cereus. Confined to the drier parts of Mex. 

 Cult, as for Cereus and related groups; see Succulents. 

 This genus is closely related to Lemaireocereus, one 

 of the several segregates of Cereus; C. queretarensis, 

 Web., is Lemaireocereus 

 queretarensis, Brit. & Rose, 

 rather than a Pachycereus 

 (see page 1836, Vol. IV). 



chrysomallus, Brit. & Rose 



( Pilocereus chrysomallus, 

 Lem . ) . Tree-like, with erect 

 branches, reaching a height 

 of 30 ft. : ribs in cult, plants 

 13: areoles with long hairs; 

 radial spines 11-13, the 

 upper H m - l n g> the lower 

 twice as long; centrals 4, 

 still longer; all the spines 

 amber-yellow, becoming 

 brown: cephalium terminal 

 or sometimes unilateral, a 

 foot long, woolly and setose. 

 Mex. The indications are 

 that the plant in cult, under 

 the above name is a true 

 Cephalocereus and not the 

 Pilocereus chrysomallus of 

 Lemaire. 



