Colin Mills, compiler of the Hortus Camdenensis, died in late November 2012 after a short illness. As he always considered the Hortus his legacy, it is his family's intention to keep the site running in perpetuity. It will not, however, be updated in the near future.

Succulents and Cacti

Crassula species unidentified

Possibly one of a number of Australian Crassula species growing locally.  [Beadle, FNSW].

  • Crassula helmsii (Kirk) Cockayne
  • Crassula purpurata (Hook.f.) Domin
  • Crassula sieberana (Schultes) Druce
  • Crassula macrantha (Hook.f.) Diels & E.Pritz.


Disocactus alatus (Sw.) Kimnach

Frost tender, freely-branching cactus with pendant primary stems, to 5m across, leaf-like, broadly linear, scalloped-wavy lateral stems and open funnel-shaped , yellowish cream or greenish white flowers, to 1.5cm across, in spring. To 30cm.  [RHSE, Don].

Disocactus flagelliformis (L.) Barthlott

Frost tender, pendant, perennial cactus with greyish-green, ribbed stems with reddish-brown spines and narrowly tubular, funnel-shaped, purple-red flowers, 8cm long in spring and summer.  [RHSE, Hortus].

Disocactus x mallisonii (Otto & Dietr.) Barthlott

A hybrid cactus, Disocactus flagelliformis x D. speciosus. Frost tender, pendant, perennial cactus with dark green, ribbed stems, dark yellow spines and funnel-shaped, diurnal red flowers, to 7cm long, mainly on the upper stems.  To 15cm.  [RHSE, Hortus].

Dorotheanthus apetalus (L.f.) N.E.Br.

Half hardy, erect red-stemmed annual with somewhat fleshy bright green leaves and solitary crimson, pink or white flowers with a dark central disk in summer.  To 10cm.  [RHSE, Hortus].

Drosanthemum candens (Haw.) Schwantes

Succulent with prostrate stems, short, blunt, cylindrical leaves covered with papillae, and white flowers, to 12mm across, but see Notes below.  [RHSD, Hortus]. 

Drosanthemum flavum (Haw.) Schwantes

Yellow flowers.  [JD].  Dwarf, erect-growing shrub with slender branches and glittering, crowded leaves, nearly circular in section.  [Sonder – Flora Capensis].

Echeveria species unidentified

Echeveria is a genus of about 150 evergreen succulents and sub-shrubs from dry areas of Northern Central and South America. The usually fleshy leaves are often highly coloured and in rosettes. The flowers are borne on long stalks from the leaf axils.  The genus includes a number of attractive house and border plants.

Echinopsis eyriesii (Turp.) Zucc. ex Pfeiff & Otto

Frost tender, spherical, later cylindrical cactus with 11-18-ribbed stems, occasionally offsetting, almost black spines, and white flowers, to 25cm long, opening in the late afternoon in summer.  To 30cm.  [RHSE].

Epiphyllum ackermanii Haw.

Frost tender, erect, perennial cactus with strap-like, flat, thin, scalloped, fleshy stems, sometimes 3-ribbed, freely branching from the base, and crimson or orange-red flowers with pale yellow-green tubes, to 12cm long, in summer.  To 45cm.  [RHSE, Hortus].

Epiphyllum oxypetalum Haw.

Epiphytic cactus with flattened, much-branched stems, evening flowering, the flowers fragrant, white, reddish on the outside.  [RHSD, Hortus].

Epiphyllum phyllanthus (L.) Haw.

Frost tender, semi-erect, bushy, semi-epiphytic cactus with cylindrical stems, 3-4-angled when old, stiff, leaf-like, scalloped branches with purple-shaded margins, and nocturnal, funnel-shaped, glistening white or pale yellow flowers, to 30cm long, with green- or red-tinged outer tepals and green tubes, in spring and summer.  To 2m.  [RHSE, Hortus].

Epiphyllum x jenkinsonii Hort.

A hybrid between Heliocereus speciosus x Epiphyllum speciosum (Don) or Nopalxochia phyllanthoides.  It has large, deep scarlet flowers, to 10cm across, followed by purple fruits. To 1m.  [Hortus, Don].

Euphorbia milii Des Moul cv. splendens (Bojer ex Hook.) Ursch & Leandri.

Frost tender, semi-prostrate to scrambling, slow-growing, mainly evergreen, semi-succulent shrub with slender, fleshy, thorny stems and branches and axillary cymes of intense red flower-like bracts and reduced floral parts in spring and summer.  To 30cm, spreading to several metres.  The type Euphorbia milii is a bushy shrub, to 1m or more.  [RHSE, Hortus].

Furcraea foetida (L.) Haw.

Frost tender succulent with lance-shaped leaves, to 2m long and tall spires, to 12m, of strongly scented white flowers in summer.  The plant dies after flowering but produces numerous seeds which often germinate and produce sizeable plantlets on the scape.  These readily root when they fall.  The cultivar mediopicta (variegata) has creamy-white longitudinal lines on the leaves.  [RHSE, Hortus].

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