nitrogen fixing

Thermopsis macrophylla - False Lupine

A west coast native annual nitrogen fixing plant in the Fabaceae family. Reminds me of Crotolaria in its growth habit and overall appearance. It looks like it has potential as a cultivated, drought tolerant biomass or cover corp species.

Thermopsis macrophylla leaf and flower.

Thermopsis macrophylla leaf and flower.

Thermopsis macrophylla flower spike.

Thermopsis macrophylla flower spike.

Eperua falcata - Bootlace tree


Endemic to the humid, lowland forests of Guyana, northern S America, E. falcata remains largely unknown outside its place of origin. The tree can make a giant, robust forest tree, with a massive spreading canopy. Flower clusters dangle at the end of long, pendant stems, which hang down in abundance, forming a fringe below the canopy. Each inflorescence forms a fairly incredible, deep mauve-pink, woody pod containing a single seed. The pod is reminiscent in shape to a machete blade, or even more accurately, a scimitar. The pods explode upon opening, flinging their seed up to 100 feet.


The resin may have slight bactericidal and antifungal properties, which account for its use as a cicatrizant (a substance that heals by inducing scarring). The resin from the bark is placed on warm leaves and tied around cuts and sores, ulcers etc as a poultice. The resin is used as a cicatrizant to heal wounds. The bark is decocted as a dental analgesic. The bitter bark is used as an emetic.

The wood yields an oil which is used as an ointment for rheumatism and to treat wounds[

The tree was considered to be the most beautiful flowering legume by the renowned Brazilian botanist Dr. Adolpho Ducke.